I purchased these both in-store and online, but I haven't used them much and will be using something else, so I'm selling them in good condition. The adult size is men's M. It's probably equivalent to a women's L. The kids' sizes are black, size 27, which is about 18-19 cm. The pink ones are size 26, which is about 17-18 cm. They have heel straps, so they're designed to stay on kids' feet. I'm not selling them separately.