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
TIE SIDE BIKINISHOPBOPDamson Madder Tie Side Bikini Bottoms Blue/Red
$55.00
$33.00 SHOPBOP
TIE SIDE BIKINIBLUEBELLA USBluebella Orta Tie-Side Bikini Brief Black
$69.00 BLUEBELLA US
TIE SIDE BIKINICOTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Plum kiss gingham
$29.99 COTTON ON (US)
FLORALKINIMetallic Gold Halter Tie Side High-Cut Bikini Set
$32.99 FLORALKINI
DAILY SALE, INC.Frill Trim Bandeau Tie Side Bikini Swimsuit
$28.00 DAILY SALE, INC.
PLANET BLUE CORPMapale Triangle Top with Tortoise Bead Details and Side-Tie Thong Bikini
$41.40 PLANET BLUE CORP
SHOPBOPSTAUD Sisley Side Tie Bikini Bottoms Sunshine
$125.00 SHOPBOP
UNIQUE KULTURE AFFILIATE PROGRAMLeopard Print Halter Neck Tie Side Bikini Set
$22.00 UNIQUE KULTURE AFFILIATE PROGRAM
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Spicy red shimmer
$29.99 COTTON ON (US)
HANKY PANKYHanky Panky Women's Peek-A-Boo Lace Side Tie Bikini - Light Ivory
$30.00 HANKY PANKY
SHOPBOPPQ Swim Tia Crochet Tie Side Bikini Bottoms Rose
$98.00 SHOPBOP
SHOPBOPVitamin A Elle Tie Side Bikini Bottoms Malachite Butterfly
$95.00 SHOPBOP
BLUEBELLA USBluebella Orta Tie-Side Bikini Brief Black
$69.00 BLUEBELLA US
SHOPBOPFARM Rio Fruit Beauty Faded Green Tie Side Bikini Bottoms Fruit Beauty Faded Green
$118.00 SHOPBOP
BLUEBELLA USBluebella Venice Tie Side Bikini Panty Navy Peony
$69.00 BLUEBELLA US
ACCESSORIZE UKFish Embroidered Tie Side Bikini Bottoms Blue, Size:
$22.00 ACCESSORIZE UK
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Plum kiss gingham
$29.99 COTTON ON (US)
FLORALKINIRose Applique String Triangle Tie Side Bikini Set - S / Cream
$35.99 FLORALKINI
PLAYALUXE USWaikiki Side Tie Bikini Bottom
$88.00 PLAYALUXE US
FLORALKINIContrast Chocolate White Color Blocking Halter Tie Side Bikini Set
$34.99 FLORALKINI
FLORALKINIMulti-Colour Horizontal Striped Print Triangle Halter Tie Side Bikini Set With Beads Detailing
$32.99 FLORALKINI
FLORALKINIColorblock Ribbed Underwire Tie Side Bikini Set
$34.99 FLORALKINI
SHOPBOPPQ Swim Tie Side Bikini Bottoms Waterlily
$76.00 SHOPBOP
FLORALKINIContrast Trim Triangle Bralette Tie Side Bikini Set
$32.99 FLORALKINI
FLORALKINIRuched Bandeau Knot Front Tie-Side Bikini Set With Stone Details
$33.99 FLORALKINI
FLORALKINIFloral Triangle Halter Tie Side Bikini Set With Beaded Details
$36.99 FLORALKINI
ACCESSORIZE UKShell Embossed Tie Side Bikini Bottoms Orange, Size:
$18.00 ACCESSORIZE UK
KARL LAGERFELD (US)Karl Lagerfeld - Side-tie Bikini Bottoms, Woman, Grey, Size: Xs
$55.95 KARL LAGERFELD (US)
PLANET BLUE CORPMapale Underwire Adjustable Top and Side-Tie Bottom Crochet Print Bikini Plus Size
$50.70 PLANET BLUE CORP
PLANET BLUE CORPMapale Underwire Mesh Insert Bikini Top with Tie-Side Cheeky Bottom
$57.00 PLANET BLUE CORP
SHOPBOPSTAUD Sisley Side Tie Bikini Bottoms Black
$145.00 SHOPBOP
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Deep taupe gloss
$29.99 COTTON ON (US)
SELDOM SEEN STYLESWomen's Color Block Bikini Set Tie Side Two Piece Swimsuit Push Up Bathing Suit
$34.99 SELDOM SEEN STYLES
FARMRIORed Ainika Garden Side Tie Bikini Bottom, AINIKA GARDEN RED
$118.00 FARMRIO
FARMRIOOff-White Sweet Bloom Side Tie Bikini Bottom, SWEET BLOOM BOUQUET OFF
$130.00 FARMRIO
CERQULARTamara Tie Side Triangle Bikini Bottom Lurex
$106.00 CERQULAR
COTTON ON (US)Body - Side Tie Gathered Brazilian Bikini Bottom - Missy spot plum kiss
$29.99 COTTON ON (US)
SHOPBOPPQ Swim Tie Side Bikini Bottoms Love Spell
$98.00 SHOPBOP
COTTON ON (US)Body - String Tie Side Brazilian Bikini Bottom - Terry stripe brown
$29.99 COTTON ON (US)
DAILY SALE, INC.Chain Linked Triangle Tie Side Bikini Swimsuit
$29.00 DAILY SALE, INC.
CERQULARElba Tie Side Bikini Bottom
$49.50 CERQULAR
HANKY PANKYHanky Panky Women's Peek-A-Boo Lace Side Tie Bikini - Black
$30.00 HANKY PANKY
ACCESSORIZE UKCrochet Tie Side Bikini Bottoms Natural, Size:
$18.00 ACCESSORIZE UK
−30%
ACCESSORIZE UKFloral Tie Side Bikini Bottoms Red, Size:$18.00
$12.60 ACCESSORIZE UK
−30%
ACCESSORIZE UKPostcard Print Tie Side Bikini Bottoms Multi, Size:$18.00
$12.60 ACCESSORIZE UK
−30%
ACCESSORIZE UKCrochet Tie Side Bikini Bottoms Multi, Size:$18.00
$12.60 ACCESSORIZE UK
−51%
BLUEBELLA USBluebella Orta Tie-side Bikini Brief Hot Coral$59.18
$29.00 BLUEBELLA US
−40%
SHOPBOPDamson Madder Tie Side Bikini Bottoms Blue/Red$55.00
$33.00 SHOPBOP
−30%
CALVIN KLEINCalvin Klein Women's Solid Side Tie Swim Bikini Bottom - Neutral$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
−30%
CALVIN KLEINCalvin Klein Women's Graphic Monogram Swim Side Tie Bikini Bottom - Orange$49.00
$34.30 CALVIN KLEIN
−30%
CALVIN KLEINCalvin Klein Women's Graphic Monogram Swim Side Tie Bikini Bottom - Light/Pastel Blue$49.00
$34.30 CALVIN KLEIN
−50%
HARVEY NICHOLS USMelissa Odabash Gorda Tie-side Bikini Briefs - Light Blue - 46 (UK14 / L)$148.12
$74.06 HARVEY NICHOLS US
