Used only once for Shichi-Go-San (a Japanese festival for children aged three, five, and seven). Kids' size M. According to the official website, it's for ages 4 to 6, but it fit a 3-year-old (usually wears 14cm shoes) and a 5-year-old (usually wears 18cm shoes) without any problems. It's sock-like, so it's easy to put on. Discounts available for combined purchases with other items. #enough's baby kids