The off-shoulder ruched bikini pairs a short top with a bow detail in back. The key question is whether the upper edge stays where you want during ordinary movement. The listing does not say that the bow adjusts the bust or replaces the need for the right size.

Check the edge and bow independently

Ask for the relaxed and gently extended top-edge measurements and a back close-up of the Khaki set. S and M top bust entries are 31 and 33 inches, while their top lengths are both 4 inches; L and XL list 34 and 36-inch busts and 5-inch lengths. Compare with a strapless or off-shoulder swim top you already wear. An extra inch in listed length may change torso coverage without changing whether the neckline feels secure.

The bottoms have waist ranges from 22–26 inches at S to 27–30 at XL. Compare that fit separately from the top. The source says no padding, no underwire and lining on both pieces; it gives no grip construction, bow function or wet-opacity result. Ask for those details if coverage or movement security is central to the purchase.