Thank you for viewing. Instant purchase and silent purchase are welcome. These were worn by my daughter for school. The size is 22cm. She has outgrown them, so I'm offering them for sale in the hopes that someone who needs them will take them. They have Velcro closures, and the laces are also made of rubber, making them easy to put on and take off. The mesh material should help to reduce foot sweat. The Velcro is losing its stickiness, and the rubber laces are stretched. I think they can be worn by both boys and girls. How about them for school or sports lessons? Color...Black