SIZE GIRTH -MOST IMPORTANT HOODIE LENGTH XS 30.5cm - 35.6cm 22.9cm S 35.6cm - 40.6cm 25.4cm M 40.6cm - 47cm 30.5cm L 48.3cm - 58.4cm 35.6cm SIZING TIPS Your chest / girth measurement is the best way to choose a size. On our chart the smaller measurement is the loose fit and the larger is a firm fit. - Extra fluffy dogs please measure above the fur. The hoodie length shown is the actual length of the hoodie. If your dogs length is shorter than the hoodie length it will overhang the tail. For the best fit slighty cropped is the way to go. Our hoodies are cut wide in the collar to make them super easy to get on even boof head breeds while still fitting super comfy on skinny necks collar measurement won't effect the fit. A little loose is fine.