Body Glove 90175 Breathable Neoprene Ankle Support, Black, Large Improves Joint Stability Contoured, Sized Fit Fully Lined, Smooth Interior Breathable, open-cell neoprene for comfort in hot conditions Contoured, sized fit Improves joint stability Fully lined, smooth interior Measure around ankle at smallest point. Large fits 9-1/4-inch to 10-inch.