PetSafe White Durable Plastic Dog Pet Door Medium Dog/Large Cat NIOB Complete! I bought the wrong size. Description Keep things simple ? we?ll open the door for your best friend. The PetSafe Plastic Pet Door lets your dog go outside for potty breaks and playtime on their own schedule. The white pet door frame is paintable, so you can customize the color to match your home decor. Installing the pet door is a simple DIY project. The pet door installs in interior or exterior wood, PVC, metal and paneled doors. A snap-on closing panel is included so you can control your cat or dog?s access and keep other animals from coming into your home. This durable, plastic pet door comes in 4 sizes to best fit your pet. Your pet deserves the best. Trust PetSafe to keep your pet healthy, safe and happy. Features Let your dog take a potty break on their own schedule Paintable white pet door frame to match your home decor Snap-on panel to close the door DIY installation into interior walls and doors or exterior doors Use with wood, PVC, metal and paneled doors from 1/16 in - 2 in thick 4 size options: small, medium, large and extra large System Includes Snap-on cover Interior frame with flap Exterior frame Plastic core covers Cutting template Product manual Hex nuts Nylon screws Door Sizing Chart Pet Door Size Pet Weight Pet Door Flap Opening Small Up to 15 lb 5 1/4" W x 8 1/8" H Medium Up to 40 lb 8 1/4" W x 12 1/4" H