It?s the harness that hugs your dog. The original step-in, easy to use single buckle harness combines fashion, function, safety and durability * Floating O-Ring lets the leash move with your dog while that harness stays in place and allows sizing adjustability * Double layer, stitched leather increases durability and product life, reinforces the natural strength properties of leather * Welded metal hardware adds to the durability and premium construction of every BB harness * Girth measurement is a snug fit around the chest, just behind the front legs. If measurement bridges sizes, use smaller harness for a full grown dog