Deluxe Pneumatic Ankle Walker: Medline's Ankle Walker allows you to pump air into the walker for desired Compression. Pneumatic system Provides support while maintaining stability and immobilization. Air is easily adjusted to achieve desired Compression and fit. Low Profile design minimizes the difference in leg height to help Promote a normal walking gait and balance. Nonskid rocker bottom sole to help reduce slipping. Accommodates swelling patterns that occur throughout the rehabilitation Process. Fits left or right leg. X-Small. Shoe size: Men's 2-4, Women's 3-1/2-5-1/2.