This swim cap is one size fits all, it fits adults (me) and kids.  It is a nice thickness, and goes on easily.   Great for lap swimming to keep the hair out of your eyes!

strong seal, doesn't budge

These caps are thin and are perfect for us girls with long hair.

My daughter loves it, because it doesn't slip off.

Really great swim cap. I am still trying to get used to wearing one!

I am not happy with it, I think I wanted one made with a different material