I ordered the size M, which is my size in all clothes and other swimsuits that I have, and it was tight/short; it pulled a lot in the crotch area (and comparatively, I have a short waist). It has a double fabric that ensures that everything is not visible when wet, but personally, the inner lining caused irritation locally (intense itching and redness) when my daughter fell asleep on me for about an hour and I sweated. Nice design and color, good construction quality, but I was disappointed with the fit.