<b>Every pet is a member of your family,it's a very important partner in your life,InnoPet is focus on bringing your pet health and happiness in their daily life. Tips:Your pet usually wears size L doesn't mean all size L will fit him/her!!!So please measure your pet and have a reference before your purchase according to the size map(PS:According to our customers reviews,you can order the larger size) <b><br> <b>Size:<b><br> S (back length:9.8", Chest:16.9", Neck:10.2")<br> M (back length:11.8", Chest:18.8", Neck:11.8")<br> L (back length:13.8", Chest:21.6", Neck:12.6")<br> XL (back length:15.4", Chest:24.8", Neck:13.4")<br> 2XL (back length:15.7", Chest:27.5", Neck:14.2")<br> If any of the measurements are 'between' two sizes, please choose the larger size. If your pet dog is growing up,you can order a bigger size.Take each measurement a bit loosely, so there will be room for your dog to move and breathe, but not too loose. <br> <b>Please measure carefully before buying and contact l us if you have any questions about fit before you bid or make a purchase.<b>