The white two-piece bikini combines a low-waist bottom with a tie-back name. Those details affect different parts of the fit. The title does not say how far the back tie adjusts, so use the published top and bottom rows first and inspect the actual fastening in the gallery.

Place the low waistband before reading its number

On a bikini bottom you already like, mark where the waistband rests below your natural waist. Compare the circumference there rather than measuring only at the narrowest part of your torso. The listing gives bottom waist 28/30/32 inches for S/M/L and bottom length 9/9/10. It does not publish hip, rise or side width, so those numbers cannot establish coverage by themselves. Ask for the bottom’s relaxed and gently stretched waistband and a back view.

The top chart gives S/M/L bust 34/36/37 inches and length 6/6/7. If one letter fits the top but another fits the low waistband, ask whether the pieces can be chosen separately; the selector shows one size for the set. The source confirms removable padding, no underwire and an 82% polyester/18% elastane blend. It does not confirm how the named back tie is anchored or its adjustment range. Check the selected White item rather than assuming a universal tie-back fit.