A tie side bikini earns its place for one simple reason: it adjusts to a body rather than asking the body to adjust to it. The strings at the hip mean the fit can be tightened or loosened depending on the day, the tan, the bloat, the mood, and that small amount of control is what makes the style feel comfortable rather than merely decorative. The bottoms that work well sit on a proper grosgrain or cotton tape rather than a flimsy cord that twists and digs, and the knot should sit flat against the skin instead of bulking up under clothing. Look for bottoms cut with a bit of depth at the back rather than a scrap of fabric on strings, since coverage at the seat is what stops the tie detail reading as an afterthought.
The top half matters just as much. A triangle or bralette style with a tie side bottom gives a silhouette that is easy to adjust evenly, so one hip does not sit higher than the other, which is the most common giveaway of a cheaply made pair.
Fabric should have a proper percentage of elastane worked through it, enough that it holds its shape after a swim rather than sagging by the second wear.
Linings ought to be the same fabric as the outer, not a separate scratchy layer, because that is usually where the quality of a bikini actually lives.
Styling one is less about complication and more about restraint. A tie side bottom looks best under an open shirt with the sleeves pushed up, or under a linen shirt dress left unbuttoned, so the knots at the hip get a moment to show rather than being hidden. Gold hardware on a bag or sandal picks up nicely against the hip ties without trying too hard. For evening by the pool, a sarong tied low rather than at the waist keeps the proportions right and stops the whole look feeling like beachwear dressed up.
These suit anywhere a swimsuit needs to do double duty, sunbed to lunch, boat to bar, a villa terrace before dinner. The adjustability is what makes them genuinely practical for travel, since one bikini can flatter more than one body shape or holiday weight fluctuation without needing a size change. That practicality, more than the look of it, is what makes the category worth taking seriously.
Top Picks
BROOKLYN’S PICK
FLORALKINIRib Ring Bandeau High Cut Bikini Set With Side Tie Sarong Skirt - S / Green
$34.99 FLORALKINI
DIANE’S PICK
KARL LAGERFELD (US)Karl Lagerfeld - Side-tie Bikini Bottoms, Woman, Pink, Size: Xs
$55.95 KARL LAGERFELD (US)
MORGAN’S PICK
SHOPBOPPQ Swim Tia Crochet Tie Side Bikini Bottoms Rose
$98.00 SHOPBOP
TAYLOR’S PICK
ANTHROPOLOGIE (US)Sea Dive Side-Tie Rio Bikini Bottoms
$68.00 ANTHROPOLOGIE (US)
RILEY’S PICK
SELDOM SEEN STYLESWomen's Front Lace-Up Tie-Side Bikini Set Two Piece Swimsuit Sexy Beach Vacation Summer Swimwear
$34.99 SELDOM SEEN STYLES
SHOPBOPPQ Swim Lace Tie Side Full Bikini Bottoms Midnight
$72.00 SHOPBOP
PLANET BLUE CORPMapale Multiway Triangle Top and Side-Tie Thong Faux Leather Bikini
$26.30 PLANET BLUE CORP
FLORALKINIContrast Colorblock String Halter Triangle Tie Side Bikini Set - XS / Pink
$33.99 FLORALKINI
BLUEBELLA USBluebella Venice Tie Side Bikini Panty Navy Peony
$69.00 BLUEBELLA US
FLORALKINIRib Ring Bandeau High Cut Bikini Set With Side Tie Sarong Skirt - S / Green
$34.99 FLORALKINI
BLUEBELLA USBluebella Orta Tie-Side Bikini Brief Black
$69.00 BLUEBELLA US
FLORALKINIRuched Bandeau Knot Front Tie-Side Bikini Set With Stone Details
$33.99 FLORALKINI
FLORALKINIWhite Textured Underwire Bralette Tie Side Bikini Set
$31.99 FLORALKINI
FLORALKINIWhite Ribbed String Tie Side Bikini Bottoms
$16.00 FLORALKINI
FLORALKINISeashell Bralette Bandeau Tie Side Bikini Set - M / White
$33.99 FLORALKINI
FLORALKINITextured Bandeau Strapless Ring High Cut Bikini Set With Side Tie Sarong Skirt - S / Khaki
$34.99 FLORALKINI
FLORALKINIMulti-Colour Horizontal Striped Print Triangle Halter Tie Side Bikini Set With Beads Detailing
$32.99 FLORALKINI
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Ocean water shimmer
$29.99 COTTON ON (US)
DAILY SALE, INC.Frill Trim Bandeau Tie Side Bikini Swimsuit
$28.00 DAILY SALE, INC.
FARMRIOOff-White Sweet Bloom Side Tie Bikini Bottom, SWEET BLOOM BOUQUET OFF
$130.00 FARMRIO
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Plum kiss shimmer
$29.99 COTTON ON (US)
SHOPBOPSTAUD Sisley Side Tie Bikini Bottoms Flame
$115.00 SHOPBOP
SHOPBOPSTAUD Sisley Side Tie Bikini Bottoms Painted Foulard
$175.00 SHOPBOP
EGO (US & CA)Tie Side Bikini Bottom In Orange Textured Print, Women's Size US
$17.00 EGO (US & CA)
SELDOM SEEN STYLESWomen's Color Block Bikini Set Tie Side Two Piece Swimsuit Push Up Bathing Suit
$34.99 SELDOM SEEN STYLES
DAILY SALE, INC.Chain Linked Triangle Tie Side Bikini Swimsuit
$29.00 DAILY SALE, INC.
CERQULARElba Tie Side Bikini Bottom
$49.50 CERQULAR
SHOPBOPPQ Swim Tia Crochet Tie Side Bikini Bottoms Rose
$98.00 SHOPBOP
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Blue mini gingham
$29.99 COTTON ON (US)
COTTON ON (US)Body - Side Tie Gathered Brazilian Bikini Bottom - Plum kiss shimmer
$29.99 COTTON ON (US)
KARL LAGERFELD (US)Karl Lagerfeld - Side-tie Bikini Bottoms, Woman, Pink, Size: Xs
$55.95 KARL LAGERFELD (US)
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Terry stripe red
$29.99 COTTON ON (US)
EGO (US & CA)Underwired Tie Side Thong Bikini Set In Leopard Print, Women's Size US
$38.00 EGO (US & CA)
PLANET BLUE CORPMapale Underwire Adjustable Top and Side-Tie Bottom Crochet Print Bikini Plus Size
$43.00 PLANET BLUE CORP
UNIQUE KULTURE AFFILIATE PROGRAMLeopard Print Halter Neck Tie Side Bikini Set
$22.00 UNIQUE KULTURE AFFILIATE PROGRAM
ANTHROPOLOGIE (US)Sea Dive Side-Tie Rio Bikini Bottoms
$68.00 ANTHROPOLOGIE (US)
COTTON ON (US)Body - Side Tie Gathered Brazilian Bikini Bottom - Missy spot white wash
$29.99 COTTON ON (US)
SHOPBOPPQ Swim Tie Side Bikini Bottoms Love Spell
$98.00 SHOPBOP
COTTON ON (US)Body - Side Tie Gathered Brazilian Bikini Bottom - Cherry dream gloss
$29.99 COTTON ON (US)
FARMRIOFaded Green Fruit Beauty Tie Side Bikini Bottom, FRUIT BEAUTY FADED GREEN
$118.00 FARMRIO
PLAYALUXE USWaikiki Side Tie Bikini Bottom
$88.00 PLAYALUXE US
PLANET BLUE CORPMapale Contrasting Fabric Halter Lace-Up Front Top and Side-Tie Thong Bikini
$32.90 PLANET BLUE CORP
SELDOM SEEN STYLESWomen's Front Lace-Up Tie-Side Bikini Set Two Piece Swimsuit Sexy Beach Vacation Summer Swimwear
$34.99 SELDOM SEEN STYLES
UNIQUE KULTURE AFFILIATE PROGRAMTextured Halter Neck Tie Side Bikini Set
$23.00 UNIQUE KULTURE AFFILIATE PROGRAM
PLANET BLUE CORPMapale Underwire Mesh Insert Bikini Top with Tie-Side Cheeky Bottom
$48.40 PLANET BLUE CORP
PLANET BLUE CORPMapale Crochet Floral Applique Waist Tie Top and Side-Tie Thong Bikini
$30.70 PLANET BLUE CORP
FARMRIOMulticolor Floraline Side Tie Bikini Bottom, FLORALINE CREAM
$130.00 FARMRIO
PLANET BLUE CORPMapale Lace Strapless Convertible Halter Top and Side-Tie Thong Bikini
$39.60 PLANET BLUE CORP
SHOPBOPSTAUD Sisley Side Tie Bikini Bottoms Sunshine
$125.00 SHOPBOP
−50%
COTTON ON (US)Body - Fixed Tie Side Brazilian Bikini Bottom - Black/gathers$24.98
$12.49 COTTON ON (US)
−37%
ACCESSORIZE UKShell Embossed Tie Side Bikini Bottoms Blue, Size:$20.00
$12.60 ACCESSORIZE UK
−51%
BLUEBELLA USBluebella Orta Tie-side Bikini Brief Island Paradise Blue$59.18
$29.00 BLUEBELLA US
−30%
CALVIN KLEINCalvin Klein Women's Graphic Monogram Swim Side Tie Bikini Bottom - Light/Pastel Blue$49.00
$34.30 CALVIN KLEIN
−30%
CALVIN KLEINCalvin Klein Women's Graphic Monogram Swim Side Tie Bikini Bottom - Black$49.00
$34.30 CALVIN KLEIN
−50%
ANTHROPOLOGIE (US)Maroc Side-Tie Bikini Bottoms$139.90
$69.95 ANTHROPOLOGIE (US)
