Lupine Basic Step In Harness Description Easy to use wrap around style keeps pressure off the throat making walks more enjoyable and safer. LupinePet's Step-In Harness is available in 3 widths, including 6 size ranges to fit any dog. A single buckle over the shoulders makes for easy on and off. Adjustable straps at the front, back and sternum ensure a perfect fit. Choose from 7 classic solid colors. • Easy to use wrap around style• Welded steel hardware• Strong, soft woven nylon webbing What size harness should my dog wear? Small Dogs - Girth lengths 9"-20" by 1/2" wide Medium Dogs - Girth lengths 12"-30" by 3/4" wide Large Dogs - Girth lengths 19"-38" by 1" wide The most accurate way to choose the correct size range is to measure your dog. A fabric dressmaker’s tape measure is easiest and most accurate. Or, a piece of string can also be used and then measured.