Women's Swimwear Size Guide

Getting women's swimwear sizing right from Asian retailers is crucial because swimsuits are nearly impossible to return if they don't fit well. Asian women's swimwear runs one to two sizes smaller than US sizes, and the cut is designed for a smaller bust and narrower torso. If you normally wear a US Medium swimsuit, you'll likely need an L or XL from Shein, Temu or AliExpress. Zara and H&M swimwear is closer to standard US sizing. For bikinis, match your top size to your bust measurement rather than your usual letter size. One-piece swimsuits need to accommodate torso length as well. Our converter maps your US swimwear size to all five stores. Always take three key measurements — bust, waist and hips — and compare with the product's chart before ordering.