If the dog jacket is intended for activity, you'll want it to extend to the base of your dog’s tail. If the dog jacket is primarily for resting and recovery, it can be slightly larger to ensure your dog’s body is well-covered when lying down.
A well-fitting dog jacket covers the large muscle groups while still allowing freedom of movement. Ensure the jacket is not too tight for your dog, as this can restrict movement and flatten the fur, diminishing the natural insulating abilities of your dog’s coat.
Start by adjusting the strap that goes around your dog’s belly. The jacket should sit close to the body, without being too tight.
For dog jackets with an adjustable collar, you can adjust this to your preference.
Some dog jackets have cinch points by the by the base of your dog’s tail. If your dog has a curled tail or carries it high, you can adjust it for a perfect fit.