AIRCAST XP Extra Pneumatic Walker Brace / Walking Boot Size: Usable for 26.5-28.5cm. I was able to use it comfortably at 27.5cm. Adjustable with air and straps. *Shipping will be on March 1st. Used for a fracture, used for about 10 days. It's quite clean. This itself is a cast, so You can wear it directly and the sole is made of a rubber material like a shoe sole, allowing you to walk. It was a very expensive orthosis, so I have been storing it at home. I will wrap it in bubble wrap and ship it. Size L Ankle support, sprain, fracture, protector Achilles tendon, osteoarthritis Air fit Please contact me if you have any questions. Thank you.