These are 18.0cm Shunso sneakers. My child has outgrown them, so I'm passing them on to someone. The inside of the right shoe is slightly open. Please check the photos. Also, there is a name written on the inside of the shoes, which I will cover with a marker before shipping. They are Velcro strap type, and the shoes themselves are light and easy to wear, and my daughter liked them. They show signs of use, but are still in good condition. Would they be suitable for nursery school or playing in the mud?