Petsafe Ultimate Pet Door Replacement Flaps

Vinyl replacement flap fits The Ultimate Pet Door and the Deluxe Patio Panel Pet Door . These are Dual (TWO PIECE) Flaps and fit all Johnson and PetSafe pet doors using the dual flap. Size Description and Inside Flap Measurement : Small - Max. Dog Weight 12 lbs - 4.25 x 7 Medium - Max. Dog Weight 40 lbs - 8 x 11.5 Large - Max. Dog Weight 80 lbs - 10.375 x 15.75 Extra Large - Max. Dog Weight 125 lbs - 13 x 18.5 How to measure your pet : Measure your pet from the top of the shoulders to the chest, just behind the front legs. This measurement is the cut out size (inside flap) that determines the size door you need.