Used once as marine shoes for playing in the river. The size is only marked as XXXS, so the exact centimeters are unknown, but my son wore them, and he is 18cm. I only used them for about an hour once, so I think they can still be used, but since they are used children's items, I would like to trade with someone who understands this. Since they are not fragile, they will be shipped in simple packaging. Please understand. Mesh material for good breathability, lightweight and comfortable kids' marine shoes. - Brand: SAY ALOHA - Color: Black/Navy - Sole Material: Rubber - Design: Mesh material Thank you for your understanding that these are used items.