Dogo - Pocket Parka Velcro closure, leash hole Faux fur trimmed hood, fleece lining Mock-neck sweater collar, removable pocket Medium (inches) Length 11-1/2 to 14, Neck 10-1/2 to 12-1/2, Girth 15-1/2 to 18 If your dog is stouter, you should follow the size according to the girth, always round up to the next larger size if your measurement is near or over the maximum range in the smaller size, or you pet has a broad chest, wide underside, or thick coat.