This was used indoors by my mother. The size is 24.5 cm EEEE. It is likely men's footwear. It is very light, and the Velcro opens wide, making it easy to put on and take off. It can also be washed whole. The accessory rubber strap for the instep for people whose feet float is not included. (My mother did not use it.) Please consider this item after understanding that it is used. It will be shipped in its original box.