Up for sale is a brand New PetSafe Medium. Wall mount pet door. I bought this, and was the. Wrong size for my dog. How to measure your pet. Classic Cut Out Size. New Freedom Cut Out Size. Up to 15 pounds. 5 1/4″ x 7 1/2″. 9 1/4″ x 13″. 6 3/8″ x 10 […]