Side Tie One Piece Swimsuits: The Adjustable Knot

What a Side Tie One-Piece Is

A side tie one-piece swimsuit closes with a string or fabric tie that knots at the side waist or hip — the tie is where the fit is set, and where the style shows. It is a one-piece with an adjustable side finish rather than a fixed seam: the knot cinches the waist, opens a small panel, or simply marks the line where the front meets the side.

What the Pool Carries

• Tie-at-the-waist styles — the knot sits at the side hip, cinching the waist.
• Wrap-look ties — the front overlaps and ties, reading like a surplice one-piece.
• Solids and prints — the tie is the constant; the surface varies.

21 styles, from about $28.

Where the Tie Sits and How It Fits

• The knot is the fit dial — tighten it to cinch the waist, loosen it to ease the panel.
• Most styles pair the tie with a set or adjustable shoulder strap, so the front stays put while the side adjusts.
• A side tie leaves the back open or low — it is a back-coverage trade for an adjustable side.

How to Shop This Collection

• Decide the knot position — side waist for a cinch, front wrap for a surplice line.
• Check the cup construction for bust support — the tie adjusts the side, the cups carry the bust.
• Check the strap type — set straps stay put; tie straps adjust too.
• Style it 90s — a thin belt under the tie, simple hoops, an open-front cover-up.

Quick Answers

Q: Will the knot come undone? A: A double knot holds through the water; re-tighten after the suit gets wet if it eases.

Q: Side tie vs wrap? A: A side tie knots at the waist or hip; a wrap overlaps the front and ties. Both adjust the fit; a wrap reads more like a surplice.

Q: Does it give support? A: The tie cinches the side; bust support comes from the cups. For fuller busts, pair with lined or structured cups.