Front and Rear Pull-On Tabs 100% Waterproof Slip-Resistant Chevron Outsole Shaft Circumference is 12.6 inches Measurements were taken from a size 9. There may be slight variations based on size. The Xtratuf Ankle Deck Men's 6-inch Boot has been crafted specifically for off-shore anglers. Anglers are athletes, and like any athlete they demand the best footwear to help them perform at a high level. We've created a lightweight design with the same slip-resisting Chevron outsole found on our Legacy boots. The ADB is a great option for anyone looking for non-slip and waterproof footwear for like on land or on the water. For those looking for a commercial grade ankle height deck boot please search for the Wheelhouse Boot.