Ideal Pet Products Air Seal Pet Door with Telescoping Frame, Large, 10.25 x 15.75 Flap Size - Transparent, unbreakable dual pane panels crafted for maximum thermal protection. - Perfectly fits doors ranging from 1-1/4 to 1-3/4 thick. - Enjoy the convenience of a spring-loaded locking slide. - Includes everything youll need to set up your pet door with ease. - Flap Size - 10 1/4 x 15 3/4. For dogs up to 90 pounds.