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 Chart12 - 10 Barrel Thompson Center Contenders