"Regain control of your daily walks with your furry friend with the PetSafe Easy Walk Dog Harness. A patented font-clip D-ring and Martingale loop reduce leash pulling, and since it rests against your dog's chest instead of their throat, you won't have to worry about it choking your exuberant walking partner. 4 points of adjustment ensure a secure, chafe-free fit. A quick-snap shoulder and belly strap means this PetSafe dog harness goes on and comes off quickly. Tough nylon construction.Manufacturer model #: EWH-HC. Secure control over your dog that discourages pulling Front D-ring and Martingale loop reduce leash pulling Won't choke or cause your dog to cough 4 points of adjustment for comfortable fit Quick-snap straps for easy on and off Tough nylon construction Sizing To properly size your dog, you need two measurements. For chest width, wrap the measuring tape across the chest, over the breast bone to 1"" behind the front legs. For girth, wrap the measuring tape down around the widest part of the ribcage up to the same location behind the front legs. XS Chest width: 8-9"". Girth: 13-18"". S Chest width: 8.5-11"". Girth: 15-21"". M Chest width: 12-15"". Girth: 21-32"". L Chest width: 16-21"". Girth: 27-40"". XL Chest width: 17.5-23.5"". Girth: 32-50""."