Size Instruction: This small dog harness fits chest girths: 20 26 inches, neck girths: 15 18 inches. Perfect for French Bulldog, Pug, Beagle, and Boston Terriers for hiking, walking or daily outdoor adventures. Breed suggestions are for reference; please measure your dog's chest, neck, and weight for the best fit. Military-standard Materials: WINGOIN dog harness for small dogs is made of military nylon and adopts an upper and lower two-layer structure. The outer camouflage pattern is 1000D nylon with sturdy stitching for extra durability, and the inner layer is a mesh material with excellent breathable, comfortable fit and no harm to the dog. Fast Wearing: The no pull dog harness for small dogs with a unique 4 quick-release buckles design, allowing you to put it on from the side of the dog s neck instead of the head.