This harness features an extra long sternum strap 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. To determine correct size, measure dog snugly around the ribcage and add 10 percent for comfort. The overall length of the harness is important also - the girth strap should sit close to the front legs so that it is supported by the ribcage rather than the soft underbelly. Limited quantities.