Thank you for viewing! These are shin guards for children, designed with breathability to support comfortable play. They are unused, but I opened them for photography and measurement. I'm sorry, I don't know how to use them. Size: I think they are for children, but the size isn't specified, so I'm not sure. Are there any people who have used them before or who can tell from this measuring tape? Please understand that they have been stored at home. Thank you. Leg guards, soccer, junior, children's shin guards, shin protectors. Injury prevention. #♡♡Non♡'s product list is here♡ k1-27