With adjustable shoulder straps and an extra-long sternum strap, this harness is designed to fit a wide range of body types. Made with welded steel D-rings and O-rings and a heavy duty side release clasp on the adjustable girth. The over all length of a harness is an important part of correct fit. The girth should sit close to the front legs so that it is supported by the ribcage, rather than by the abdomen. To determine correct size, always measure the dog snugly around the ribcage, close to the elbow, and then add about 5-10% comfort. All Lupine Collars and leads are 100% guaranteed even if chewed!