Specifications:
Small -- Chest Girth: 41 cm / 16.14 inch, Clothing Length: 26 cm / 10.23 inch, Recommended Weight: 5.5-8.8 lb.
Medium -- Chest Girth: 46 cm / 18.11 inch, Clothing Length: 28 cm / 11.02 inch, Recommended Weight: 9.9-13.2 lb.
Large -- Chest Girth: 51 cm / 20.07 inch, Clothing Length: 31cm / 12.20 inch, Recommended Weight: 14.3-18.7 lb.
XL -- Chest Girth: 56 cm / 22.04 inch, Clothing Length: 34 cm / 13.38 inch, Recommended Weight: 19.8-24.2 lb.
XXL -- Chest Girth: 61 cm / 24.01 inch, Clothing Length: 37cm / 14.56 inch, Recommended Weight: 26.4- 30.8 lb.

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.