<p><b>The Large Cat Door (White)</b></p> <p>Outer Size: 9.8" x 11" x 2.15"(W x H x D)</p> <p>Inner size: 7.9" x 8.7"(W x H)</p> <p>Cut-Out Size: 8.3" x 9.5" (W x H)</p> <p>It's suitable for cat & doggie lighter than 25.54 lb and waist circumference shorter than 24.8". Please make sure your pet's waist first, thanks.</p> <p><b>Note:</b></p> <p>1). Make sure that the width and height(shoulder level) of the pet are inferior to the pet screen door, thanks.</p> <p>2). The depth of door/wall/window you are going to install to had better more than the depth 2.17", so as to screw in 8 screws from both sides easily.</p> <p>3). If the cat door is too thick for the door, please use scissors or cutting machine to cut along the line in the width of the frame.</p>