These are 60cm panda skis. (They attach to your own snow boots for skiing) There are no manufacturer's instructions, but they can be used with shoes sized 15-18cm. They can also be used with snow boots or rain boots, and are intended for children aged 3-5 years old. (The compatible size is based on the manufacturer's product description) They have been used for approximately 5-6 hours. They are in good condition with minimal damage, but as they are used items, there may be some scratches or dirt. Please be aware of this.