A string triangle top is one of the simplest garments in swimwear: two unlined or lightly lined cups on a sliding cord, plus two neck ties. That simple build is exactly why one adjustable swimsuit can become a halter, a cross-neck, a bandeau, a scoop or a one-shoulder top, as long as the cups slide freely and the strings are long enough. Before trying anything, I untangle every string, loosen it fully and set the cups in front of a mirror. Tie double knots or firm bows, never tight enough to press on your neck. Then move: lift your arms, bend and twist. The low-support shapes below belong on a sun lounger, not in the surf.
Read the Strings Before You Try a Single Style
Not every triangle top can do all fifty of these. The construction decides, so I check three things before I start twisting anything.
- Do the cups slide? Pull one cup along the underbust string. If it moves freely, the cord runs through a channel and you can gather, spread or flip the cups. If the cups are stitched in place, you're limited to the halter, cross-neck and back-strap variations.
- How long are the ties? Stand with the top in place and hold each loose end. Wrap styles and double crosses need strings long enough to go around the body and still leave a good length to knot. Short ties should stick to the classic and front-bow styles.
- Is the cord flat or round? Flat ties spread pressure and stay where you put them. Round cords roll and can cut in, so keep wraps on round cord loose and short.
The Knot That Actually Holds
Most tops come loose because of the knot, not the style. Tie a square knot: right over left, then left over right. If the two loops end up crooked, you've tied a granny knot, which slips once swim fabric gets wet. Add a bow on top only after the square knot is done. For anything you plan to swim in, finish with a second knot over the bow.
1. Classic Halter Triangle Bikini Tie
Start here, because the classic halter shows you how your particular top is cut. Slide the cups along the underbust string until each one sits centered over the bust, tie that string behind your back, then take the upper straps behind your neck and finish with a bow. Re-check the cups once everything is tied, because the fabric shifts as the tension changes. The band should feel snug but not dig in, and the neck bow a little looser than you think. It's the version I'd wear for swimming and for walking along the beach under a button-down.
2. Criss-Cross Neck Triangle Bikini Tie
One cross at the neckline is the smallest change you can make, and it already looks different. With the band tied, bring both upper straps toward the front of your neck, cross the right over the left, then take them around and tie at the back. Keep the X dead center or one strap will rub the side of your neck. Crossing pulls the cups slightly inward, so check the outer edges for coverage afterward. A sarong and flat sandals finish it.
3. Front Cross Halter Bikini Tie
Dropping the cross lower, between the cups, makes it far more visible. Tie the underbust strings as usual, pull the upper straps down, cross them between the cups, pass each under the opposite side of the bust and bring both up around your neck. If the straps slide off the cups, tighten the center cross a little; pulling harder at the neck only adds strain there. You need long, soft strings and sliding cups for this one. High-rise bottoms and a linen shirt suit it.
4. Double Cross Halter Bikini Tie
Twisting the straps twice instead of once turns the center into a small decorative rope. After fastening the band, bring the neck straps down between the cups, cross them, wrap them around each other again, then take the ends up and tie behind your neck. Keep that twisted section short. A long twist acts like a drawstring and drags both cups toward the middle. I'd keep this one for lounging and gentle walks with a sun hat and cover-up.
5. Choker Halter Triangle Bikini Tie
The choker halter is a fashion tie, not a swimming tie. Put the top on normally and tie the band, take the upper straps around your neck, cross them at the back and bring the leftover length forward. Wrap each end loosely once around the base of the neck and tie a small bow at the side or front. A finger should slide easily under that choker; if it can't, loosen it. Short or stiff strings won't do this comfortably, so skip it with those. It pairs well with a sheer overshirt and a woven tote.
6. Upside-Down Scoop Neck Bikini Tie
Flipping the top upside down is the most useful trick a triangle top has. The wide gathered edges move to the top and the points face the floor, which turns a pointed neckline into a rounded scoop. The old underbust string now goes around your neck, and the old neck straps tie around your back. Slide the gathers until both sides match. Coverage changes in this position, often at the inner and outer edges, so check both carefully before you trust it. I'd rather have a secure fit than a dramatic scoop. High-waisted bottoms and white slides keep it clean.
7. Scoop Cross Neck Bikini Tie
This is the scoop with a crossed X added above the bust. Flip the top, lay the original underbust cord along the upper cup edges, cross the ends once at the neckline and take them behind your neck. The original neck strings become the new back band. Adjust slowly, because tightening the upper cross also moves the cups. The X should sit flat and centered. Tie a firm bow, lift both arms to test it, and wear it on calm beach days with a long open shirt.
8. Inverted Halter Triangle Bikini Tie
Here the inverted top is worn with a small gap between the cups instead of gathering them together. With the top upside down, the original bottom string goes behind your neck in a flat double knot or bow, and the original neck straps run under the bust and tie at the back. Keep both downward points centered so the shape looks intentional rather than slipped. Because the coverage moves around in this position, check the sides and center before you walk anywhere. A wrap skirt and flip-flops suit it.
9. Inverted Front Bow Bikini Tie
A front bow under the bust gives the inverted shape a focal point. Turn the triangle top upside down, take the original underbust string around your neck and set the cups with points down. Then, instead of tying the old neck straps at the back, bring them under the bust and tie a neat bow at center front. Slippery swim fabric loosens bows, so tie a double knot first and make the bow on top of it. With no anchor at the back, this one is for lounging only.
10. Front Bow Bandeau Bikini Tie
Lose the neck straps entirely and you have a bandeau. Turn the top upside down, slide the cups close together along the original underbust string, wrap it around your torso and tie it firmly behind your back. The remaining straps meet between the cups in a firm bow. Turn the cups so the points face outward and the wide edges form the top and bottom of the bandeau. Strapless shapes have no vertical support at all, so give the cups a tug sideways to make sure they can't slide apart. Sunbathing only, with full-coverage bottoms and a kimono.
11. Back-Tie Bandeau Triangle Bikini
If you want a smooth front with no bow, tie the bandeau at the back instead. Turn the cups sideways so their wide gathered edges meet in the middle, join the two shorter ends between the cups with a square knot, then take the long strings around your ribs and tie them behind you. Spread the cup fabric outward for coverage. A square knot lies flatter than a granny knot, which matters right over the breastbone. This needs long strings and a fabric with good stretch. It's a low-support option for lounging.
12. Keyhole Bandeau Bikini Tie
Leaving a narrow gap in the bandeau creates a small keyhole. With the top flipped and the cups sideways across the bust, slide them together but stop short of touching. Tie the shorter front straps in a compact knot just above or below the opening, then wrap the long string around your torso and secure it at the back. The keyhole is meant to be decorative, not revealing, so test it standing, sitting and with arms raised. Espadrilles and a sarong keep it relaxed.
13. Bandeau Halter Triangle Bikini Tie
Adding a neck anchor to the bandeau gives it far more security. Position the cups sideways with their gathered sections toward the center, wrap the original neck strings around your back as the band, then take the longer strings up from the center, separate them and tie behind your neck. The cups end up as two softly gathered panels. Tighten the back band before the neck; in any well-fitting top, most of the support should come from the band, not from your neck. It's steady enough for walking around the pool.
14. Twisted Bandeau Triangle Bikini Tie
A single twist in the center gives a strapless top some shape. Lay the bikini flat, slide both cups to the middle of the string and flip one cup over once. Set that twist between your breasts, spread the cups outward, wrap all usable strings around your torso and tie them at the back. Tuck or knot any short ends near the center. Check that the twist doesn't flash the lining or press unevenly. This is for sunbathing; a strapless twist won't stay put through waves.
15. Classic Front-Tie Triangle Bikini
Moving the band's bow to the front is an easy update that keeps the classic fit. Slide the cups apart until the loose ends of the bottom string sit at center front, run the middle of the cord around your back, then tie the two ends under the bust in a double-knotted bow. Tie the neck straps behind as usual. The bow should sit between or just under the cups without pushing them up. Even the loops so it looks deliberate. Because the shape is still the classic halter, this one feels quite secure.
16. Center Knot Triangle Bikini Tie
A small center knot is the cleaner sister of the front bow. Keep the top upright, slide the cups far enough apart that the band can wrap around your back with both ends meeting at the front, and tie them in a square knot under the bust. Very long strings can go once around the torso before coming back to the center. The knot should lie flat, never on sensitive skin. It shows nicely through an open cover-up.
17. Center Bow Triangle Bikini Tie
Bow loops under the cups make a plain top look softer. Set the cups upright, move them along the cord until the free ends meet at center, take the long section around your torso and bring the ends forward. Knot first, then bow. Keep the bow small: big loops catch on a cover-up and get heavy when wet. Check that the band stays level across your back, then tie the neck straps the usual way. Side-tie bottoms and a maxi cover-up go well with it.
18. Front Rope Triangle Bikini Tie
The front rope runs a narrow twisted line down the center of the chest. Tie the band behind you and place the cups. Bring both neck straps forward, cross them at the base of your neck and twist them around each other several times, then take that rope down between the cups. Loop the ends around the center of the underbust string and knot them. The rope shouldn't drag the neckline down. Short strings only allow a short twist. Active movement shifts the center line, so wear it lounging.
19. Vertical Center Strap Bikini Tie
For a cleaner version of the rope, twist the straps tight enough that they read as one strap. Tie the lower cord behind you and set the cups, bring the upper strings together above the bust and tie one small knot. Twist the two ends firmly, run them down between the cups, split them at the band, wrap each around the cord and double knot. Leave a little slack along the center strap for breathing. If the cups get pulled together, reposition them. Metallic sandals and a sheer cover-up suit it.
20. Single Chest Wrap Bikini Tie
Long bottom strings can make a wrapped band under the cups. Wear the cups in the standard position and tie the neck straps first. Cross the bottom strings once behind your back and bring them forward under the bust, keeping both strands flat and parallel. Tie at center front, or carry them back again if there's length left. Wet fabric shrinks against the skin slightly and feels tighter, so wrap a little looser than feels right when dry. The band should never roll.
21. Double Chest Wrap Bikini Tie
Two horizontal bands need extra-long lower strings. Tie the neck straps and set the cups for full coverage, take the underbust strings behind you, cross them and return them to the front, cross again below the cups and wrap around the torso once more. Finish with a flat double knot at the back or a small side bow. Keep the bands evenly spaced, not stacked on top of each other. Several layers of string tighten when wet, so take a deep breath and bend over before you get in the water.
22. Waist-Wrap Triangle Bikini Tie
A waist wrap carries the strings down across the midriff for a longline look. Tie the neck straps first. Take the lower strings behind your ribs, cross them, bring them diagonally to the front of the waist, cross again above the navel and tie at the back with a bow you can release easily. Soft tummy areas show every tight string, so keep the diagonals smooth and loose. You need very long ties, and it's not built for sport. Low-rise bottoms keep the wrap visible.
23. Side-Waist Bow Bikini Tie
Finishing the wrap with a bow at one hip makes it look more relaxed. Tie the neck straps and set the cups classic-style. Take the underbust strings around your back, cross them, bring them forward and guide both diagonally to one side of the waist, then knot and bow just above the hip. Pick the side your bag doesn't sit on, or the strap will crush the bow all day. Purely decorative and best for lounging.
24. One-Shoulder Triangle Bikini Tie
The one-shoulder tie gives an asymmetric neckline while both cups stay upright. Tie the band first. Take the upper strap from one cup across the chest and over the opposite shoulder, bring the other upper strap under the arm on that same side, and join them behind the shoulder with a double knot. Tuck the ends. The diagonal strap tends to lift one cup higher, so check both sides in the mirror. One strap holds less than two, so test it well and keep it for calm days by the pool.
25. One-Shoulder Bow Bikini Tie
The same asymmetric shape looks softer finished with a bow on the shoulder. Fasten the band and spread the cup fabric evenly. Draw one neck strap diagonally across the chest to the opposite shoulder, bring the second strap up under that arm and meet it on top of the shoulder. Knot, then bow with short loops. Flatten both straps so they don't twist and chafe. The bow belongs on the shoulder, not against the neck. Full-coverage bottoms and a sun hat suit it.
26. Straight-Shoulder Triangle Bikini Tie
Running each strap straight over its own shoulder turns the top into a simple bralette from the front. Tie the band firmly, take each upper strap over its matching shoulder and knot it to the back band. Measure the two attachment points the same distance from your spine, or one cup will sit higher. The upper strings have to be long enough to reach the band without strain. It takes all the weight off the neck, which many people with neck or shoulder tension prefer.
27. Bralette Triangle Bikini Tie
The bralette tie copies an ordinary two-strap bra. Wrap the lower cord around your torso and tie it at center back, then bring each upper strap straight over its shoulder and down to the band. Loop the right strap around the right side of the cord and the left around the left, and double knot each one separately. Level the cups by sliding the knots. Two separate shoulder anchors spread the load better than one neck bow, but test both knots before you swim.
28. Racerback Triangle Bikini Tie
A racerback moves the straps off the neck and into the center of the back. With the band tied and its knot centered, take both upper straps over your shoulders, cross them between the shoulder blades, loop each around the opposite side of the band and double knot. The crossing point decides everything: too low and the straps slip off your shoulders, too high and they pull toward the neck. It's hard to see behind yourself, so ask someone to check. Tied well, it's one of the steadier options here.
29. V-Back Triangle Bikini Tie
A V-back draws two diagonal lines without crossing anything. Fasten the band with its knot at center, bring both upper straps over your shoulders and angle each toward the middle of the band so they meet in a V. Tie them around the band with a compact knot or bow. Adjust the cups first, then tighten the back. Raise your arms: if the straps slide outward off your shoulders, bring the V point higher. It gives a tidy back view under an open shirt.
30. X-Back Triangle Bikini Tie
In an X-back, the right strap goes over the right shoulder to the left side of the band and the left strap does the opposite, so they cross between the shoulder blades. Secure the band first and set the cups evenly. Double knot both straps with equal tension. If one cup lifts or twists, the opposite strap is too tight; loosen it and rebalance. Tying this neatly on your own is fiddly, so a second pair of hands helps.
31. Double X-Back Triangle Bikini Tie
Extra-long straps can make a double X. Tie the band low and centered, cross the upper strings between the shoulder blades, loop each around the band, then take them back up, cross again and tie at the center back. Every line needs the same tension and should lie flat. Watch that nothing presses on the spine or restricts your shoulders. Practice this at home first; it's not a tie to work out on a windy beach. A backpack will flatten the straps, so carry a hand bag.
32. Shoulder-Bow Triangle Bikini Tie
Separate shoulder bows give a sweet bralette shape, but only some tops can do it. Tie the band and set the cups. Each upper strap needs its own anchor point on the back band, so bring one strap over each shoulder, tie it to its side of the band and form a small bow on top of the shoulder. If your top's construction doesn't allow independent attachment safely, skip it. Keep both bows compact and equal, then move your arms in every direction. If it feels unstable, keep it for lounging.
33. Side-Bow Triangle Bikini Tie
Side bows under the arms add detail while the front stays classic. This only works on tops made with separate side tie points; the band has to be split so each side anchors near the underarm. Tie a firm bow on each side, then the halter at the neck as usual. Set the bows a little forward of the armpit, where they won't rub when your arms swing. Equal tension on both sides keeps the band level.
34. Ruched Triangle Bikini Tie
Gathering the cups makes the triangles narrower and more ruched, and it's one of the easiest changes. Leave the band untied, slide each cup inward along the cord to bunch the fabric into even gathers, and stop before coverage gets too small. Hold them there while you tie the band firmly, then tie the neck straps and spread the ruching evenly. Nothing about the knots changes, only the cup shape. Sit, bend and lift your arms afterward to check.
35. Wide-Coverage Triangle Bikini Tie
Spreading the cups wide gives the fullest coverage a triangle top can offer. Before putting it on, pull the gathers outward along the lower string until each triangle is broad and fairly smooth. Tie the band, then the neck, then fine-tune the outer edges. Stop before the center pulls tight or the lining distorts; overstretching the fabric shows as rippling along the edge. Flatter cups also sit more neatly under a loose cover-up. This is the setting I'd recommend for larger busts.
36. Center-Gathered Triangle Bikini Tie
Center gathering brings the cups closer together while keeping them upright. Start with the band loose, slide both cups toward the middle and leave only a small gap. Some tops let you tie a temporary knot in the center section; only do that if it won't strain the fabric. Wrap the rest of the band around your torso and tie it, then the neck straps. The cups must not overlap or show their lining. Expect less coverage at the outer edges with this one.
37. Sweetheart Twist Bikini Tie
A small twist between the cups can hint at a sweetheart curve. Set the top upright, slide the cups toward the center, rotate the inner part of the band once so the cups angle slightly upward, then tie the band behind you. Leave the neck straps loose until the twist is right, then spread the upper cup edges into a gentle curve and check that no lining shows. The twist shapes the neckline; it shouldn't squash the bust. It's a lounging tie.
38. Butterfly Twist Bikini Tie
The butterfly twist angles the cups inward like wings around a crossed center. Rotate the top so the cups lean in, bring their inner corners to the middle of the bust, cross the connecting strings and twist them again to hold the edges in place. Tie the outer strings around your torso at the back, and use the upper ties as a halter or tie them behind your shoulders, depending on length. Keep the twist compact. It's a fashion tie for lying in the sun.
39. Diamond Keyhole Bikini Tie
Crossing both the upper and lower strings can frame a small diamond at the center. Set the cups upright with a narrow gap, cross the lower free ends below the gap and tie them at your back, then bring the upper straps down, cross them above the opening and take them up around your neck. Size the diamond before tightening any knot. If the crossings pull the cups away from the bust, the diamond is too big. Poolside wear, with a long sheer cover-up.
40. Front V Triangle Bikini Tie
In a front V, the neck straps run down the inner cup edges to meet under the bust. Tie the band, place the cups normally, bring the upper straps down until they meet at the band and cross or knot them there. Then take the remaining ends back up and around your neck. Keep the knot soft and flat. If the V pulls the cups inward, let a little length out at the neck. High-leg bottoms and an open shirt complete it.
41. X-Neck Triangle Bikini Tie
The X-neck moves the cross up near the collarbone. Tie the band, bring both upper straps across the front of your neck in a single X just below the collarbone, continue them around opposite sides and tie behind your neck. Smooth the straps flat so the cross doesn't roll into a cord. Leave clear space at the throat. It tends to pull the cups inward, so spread them out again once the bow is tied.
42. Reverse X-Neck Bikini Tie
The reverse X-neck crosses behind the neck instead of in front. Tie the band and balance the cups, take both upper straps over your shoulders, cross them at the back of the neck and bring the ends forward. Run them down the outer neckline and tie them between the cups or around the center of the band. Keep the back cross below the hairline, where it won't tug. Since the finish sits at the front under tension, use a solid double knot.
43. High-Neck Lattice Bikini Tie
A lattice uses repeated crosses to build a high-neck panel. Tie the band and leave a bit more space than usual between the cups. Cross the upper straps above the bust, cross again nearer the collarbone with even gaps, then tie behind your neck. Don't add more crossings than your strings can handle comfortably, and keep every line well clear of the throat. Wet strings slip, so the lattice loses its shape in the water. I'd keep it for poolside photos.
44. Center-Loop Triangle Bikini Tie
A loop in the center gives a ring-like detail without any hardware. Tie the band and set the cups upright. Bring both neck straps down between the cups, pass one around the other to make a loose loop, shape it into a small round, then take the ends up and tie behind your neck. Center the loop. Don't cinch it into a hard knot over the breastbone, and don't let it carry all the tension; the band and neck tie should do that.
45. Knotted Cup-Tip Bikini Tie
Small knots near the cup tips mark where the straps begin. Lay the top flat and tie a loose overhand knot in each upper strap close to the cup, at exactly the same height on both sides. Then tie the band and the neck as usual. The knots should sit above the cups, not on skin. Skip this if knotting strains the seam where the strap joins the cup, or if it leaves too little length to tie at the neck. It keeps the classic triangle shape with one small detail.
46. Double Underbust Knot Bikini Tie
Two stacked knots at the front give a structured center. Slide the cups apart until both band ends reach the front, wrap the long part of the cord around your back and bring the ends under the bust. Tie one firm knot, then a second right below it. Leave the strings hanging neatly or make a tiny bow if there's length left. Tie the neck straps and make sure the double knot isn't pressing into your skin. Simple, but it looks different from the plain halter.
47. Longline Wrap Triangle Bikini Tie
Several bands below the cups make a longline top. Tie the neck straps first. Take the extra-long lower strings around your back and cross them, return them to the front under the cups, cross again and angle them down to wrap around your natural waist, then bow at the back. Space the bands evenly. You should be able to sit and breathe deeply. Flat, soft strings stay put; round cords roll and dig in, so check which kind your top has.
48. Low-Back Triangle Bikini Tie
A low-back finish moves the final knot further down for a cleaner upper back. Tie the halter and settle the cups. Keep the band directly under the cups first, then angle the strings down and cross them at the center of your back; if there's enough length, carry them around the waist and bow at the lower back. If the band drops away from under the cups, the top loses its anchor, so that first stretch must stay horizontal. Lean forward and lift your arms to test it.
49. Shoulder-And-Waist Wrap Bikini Tie
This combination uses the upper ties as shoulder straps and the lower ties as a waist wrap. Tie the band temporarily while you position the cups, take each upper strap over its matching shoulder and attach it to the back band. Then extend the remaining lower strings around your torso, cross them at the front and tie them at one side of the waist. Keep the shoulder and waist ties adjustable separately so one doesn't drag the other. It needs very long strings. Keep it for calm activities unless the top feels completely stable.
50. Secure Double-Knot Triangle Bikini Tie
For real swimming, go back to a well-fitted classic tie and reinforce it. Spread the cups wide enough to cover without overstretching, tie the band in a firm double knot behind your back, add a small bow on top if you like, and finish the neck the same way. One finger should slide under each band. Then raise your arms, bend, twist and walk; nothing should move. If you're surfing or swimming hard, a purpose-built sports swim top is honestly the safer choice. Full-coverage bottoms, a lightweight rash guard and water sandals round it out.
Bigger Busts and the Neck Strain Problem
A string triangle has no underwire and no molded cup, so all the lift comes from the ties. With a fuller bust, a neck-only halter can leave you with a stiff neck by the afternoon. The fix is to load the band instead. Tie the underbust string snugly first, then tie the neck just firmly enough to keep the cups in position.
The straight-shoulder, bralette, racerback and X-back ties spread the weight across both shoulders and are the ones I'd point larger cups toward. Spread the cups wide rather than gathering them. Upside-down, bandeau and twist styles move the cups around and often leave too little fabric at the sides. Those are better on a smaller bust, or for lying down.
What Pool and Sea Water Do to the Ties
Chlorine, salt and sunscreen are hard on swim fabric, and the ties suffer first because they're thin and constantly knotted. Rinse the whole top in cool fresh water as soon as you can after swimming, and untie every knot so water reaches the fibers trapped inside. Hand wash with a mild soap, press out the water in a towel, never wring, and dry it flat in the shade. Strings that have gone stretchy and limp won't hold a knot anymore. At that point, stick to the classic halter or replace the top.
Fifty Ties, One Rule About Comfort
An adjustable string top can do a lot, but comfort and coverage should decide every knot you tie. Practice at home with a fully adjustable, unstructured top, and check each style from the front, sides and back before wearing it out. The classic halter, bralette, X-back and double-knot versions hold up to movement; bandeau, lattice and long wrap styles are for lying in the sun. Never force short straps, and never tie a cord tight around your neck or waist. Learn three or four that suit your top and your body, and you have fresh swim looks for the whole season.
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