Super concealable, super comfortable Cordura nylon holster hides small and medium guns; even compact large frame autos inside pant leg. Wraparound design snugs holster strap around ankle; soft knit fabric lies next to skin. Cinch-down design with Velcro adjustment; removable calf strap Velcro-adjustable. Right hand model for inside of left leg. Nylon web retention strap with reinforced thumb break.Size Chart0 - 2-3 Barrel Small/Medium Double Action Revolver (except 2 5-shot)1 - 3-4 Barrel Medium Automatic10 - Small Automatics (22-25 Calibers)12 - 10 Barrel Thompson Center Contenders16 - 3 1/4-3 3/4 Barrel Medium & Large Automatics