Cramer Active Ankle T1. Comfort. Protection. Mobility. Single quick-fastening strap adjusts for high and low top shoes. Rigid side supports and thick foam, linked to a rigid stirrup help prevent side-to-side movement, while hinges allow foot to flex forward and backward. Size of ankle brace is determined by shoe size. Fits mens shoe size 5 - 8.5 and ladies shoe size 6.5 to 9.5.