I ordered the child large for myself. I am a women and have found most masks so big! It fits perfect! These masks are very comfortable. I bought one black and one navy blue. My only complaint is the material has started to wear a bit with only a few washes. There are tiny little elastics sticking out especially around the nose. It is not too obvious and otherwise they look very nice and I am very happy with my purchase.
Great mask for everyday use. Could wear it for hours without feeling suffocated.