Measure For a Perfect Martingale Fit
Measure around the largest part of your dog's head, usually the point just behind their ears.
Measure around their neck at the point where you would like the collar to rest.
• Choose the smallest collar size that will fit over the largest part of the head (point A).
STILL NOT SURE?
Leave your pet's measurements during the checkout process, especially if your dog is of a non-sighthound breed.