Upper Material: Synthetic Leather Outsole Material: Rubber Use velcro, easy for kids to wear. Made of durable materials with non-skid soft soles, classic style, suitable for winter snow days. Keep the feet warm and comfortable all-day long. We never get rabbit hair from live rabbits. Our rabbit hair comes from rabbit meat processing plants.3.5 UK Child/CN 21 = Inside length 12.5cm / 4.9 inch4.5 UK Child/CN 22 = Inside length 13.0cm /5.1 inch5.5 UK Child/CN 23 = Inside length 13.5cm / 5.3 inch6 UK Child/CN 24 = Inside length 14.0cm /5.5 inch7 UK Child/CN 25 = Inside length 14.5cm / 5.7 inch7.5 UK Child/CN 26 = Inside length 15.0cm /5.9 inch8 UK Child/CN 27 = Inside length 15.5cm / 6.1inch8.5 UK Child/CN 28 = Inside length 16.2cm /6.4 inch9 UK Child/CN 29 = Inside length 16.8cm / 6.6 inch10 UK Child/CN 30 = Inside length 17.5cm / 6.9 inch