First things first. **Make sure you know your dog's measurements**
Measure your dog from the collar to the base of the tail. This measurement is more important than girth.
The measurement is also based on your dog crouching in the pack. Make sure when fitting your dog that they are not standing.
GIRTH - Measure around the widest part of the dog's chest.
LENGTH - Measure from the collar to the base of the tail.
If your measurements don't line up perfectly with one size or have a growing dog, don't worry. Select the size that accommodates your largest measurement. You can always add a Booster Block to make up for lack of length.
Need some extra help? Check out the Sizing Guide video below!