You may refer to our dog collar size by breed reference for the suggested size based on your dog’s breed.
But for the best fit, we recommend that you measure your pet’s neck where the collar will naturally sit. Make sure it is not too tight and not too loose. Generally, you should be able to fit two fingers (0.25″ to 0.5″) between the neck and the collar.
For AlphaCollar and IndieCollar: