PetSafe MeAC:APte Pet Door for pets up to 40 lbs. Durable and paintable plastic frame with a snap-on closing panel for added security. This pet door fits doors 1/16" to 2" thick, with a cut-out size of 9-1/4"W x 14"H and a flap opening size of 8-1/8"W x 12-1/4"H. Perfect for storm doors and provides easy access for your furry friend. Dimensions: 10 5/8 x 15 1/8. Flap opening - 8 1/8 x 11 3/4.