Because the style is ALL-Coverage, it's like putting a pair of waterproof shoes on your puppy. Therefore, the size of the entire raincoat cannot be perfectly fit, and the feet might be a bit too big or too small. Different dogs come in different shapes and sizes?Please measure the size of the dog and refer our dimension chart to select the right one before buying. size chart : S chest 16.9 inch back length 9.8 inch for weight 3.3-5.4 lb M chest 18.5 inch back length 11.8 inch for weight 5.5-8.7 lb L chest 20.8 inch back length 13.7 inch for weight 8.8-12 lb XL chest 23.3 inch back length 15.7 inch for weight 12.1-15.4 lb raincoat for dogs small rain coat for dogs