Warm Tips: Don't guess your dog's size. Please measure your dog at the narrowest point of the waist.
| Size | Waist |
| Small | Newborn-10.5" |
| Medium | 12"-15" |
| Large | 15"-17" |
| X-Large | 17.5"-27" |
Note: If your dog is in between sizes, factor in their weight. A heavier dog, go up a size, a skinner dog, go down a size.