Specifications:
Medium -- Back Length: 32cm / 12.59inch, Chest Girth: 46-52cm / 18.11-20.47inch, Recommended Weight: within 17.63lb
Large -- Back Length: 34cm / 13.38inch, Chest Girth: 52-58cm / 20.47-22.83inch, Recommended Weight: within 22.04lb
X-Large -- Back Length: 36cm / 14.17inch, Chest Girth: 58-62cm / 22.83-24.40inch, Recommended Weight: within 27.55lb
XX-Large -- Back Length: 38cm / 14.96inch, Chest Girth: 62-68cm / 24.40-26.77inch, Recommended Weight: within 31.96lb
SIZE ATTENTION:
1.If any of the measurements are "between" two sizes, choose the larger size is recommended. If your measurements are toward the upper end of the range given for a particular size, you may also want to choose the larger size, as you may also wish to do for heavily coated dogs to accommodate all that fur.
2.Take each measurement a bit loosely, so there will be room for your dog to move and breathe, but not too loose.