Pet Door Sizing – RANGER Pet Doors
| Size | Pet Opening | Example Breed |
|---|---|---|
  | 6” x 10” (155 mm x 255 mm) | Shih Tzu, Havanese, Yorkie, Most Cats |
  | 9” x 13” (230 mm x 330 mm) | Beagle, Brittany Spaniel, Scottish Terrier, Maine Coon Cats |
 | 11” x 17” (280 mm x 430 mm) | Lab, Golden Retriever, Boxer, Husky |
 | 16” x 23” (405 mm x 580 mm) | Great Dane, Great Pyrenees, Mastiff |
Doors for Pets of All Sizes
Dogs certainly don’t come in just one size, so we make four different sizes of our dog doors to accommodate dogs from Poms and Yorkies to Great Danes and St. Bernards.
Getting a dog door of the correct size and mounting it at the correct height is important for the comfort and health of your dog. The more comfortably your dog can pass through a door, the easier it will be for them to use it now and in the future.
To test how our door sizes will work for your unique dogs, you can try the simulation below.
Door Dimentions
- Pet Opening – The smallest opening through which your dog will have to pass when using the door. This dimension is used for properly sizing the door for your dog.
- Rough Opening – The size of the hole in your door needed to accommodate the Freedom Pet Pass dog door.
- Frame Size – The overall size of the frame on the pet door; the footprint of the dog door on your human door.
| Size | Pet Opening | Rough Opening | Frame Size |
|---|---|---|---|
| XL Dog | 16” x 23” (405 mm x 580 mm) | 20 3/4” x 29” (530 mm x 740 mm) | 21 3/4” x 30” (550 mm x 760 mm) |
| Large Dog | 11” x 17” (280 mm x 430 mm) | 15” x 21 1/2” (380 mm x 545 mm) | 16” x 22 1/2” (405 mm x 570 mm) |
| Medium Dog Mega Cat | 9” x 13” (230 mm x 330 mm) | 13” x 17 1/2” (330 mm x 445 mm) | 14” x 18 1/2” (355 mm x 470 mm) |
| Small Dog Standard Cat | 6” x 10” (155 mm x 255 mm) | 10” x 14 1/2” (255 mm x 370 mm) | 10” x 14 1/2” (280 mm x 395 mm) |
*large wall-mounted door will fit between 16” on center studs (14½” nominal space), just with less space for shimming and weather sealing compared to a 14¾” opening.
The 2-in-1 DoubleMag flap system has a smaller pet opening coming back into the house from the outside than it does going from the inside out. The pet opening shown and listed is the smaller of the two dimensions. Going from the inside out, the opening is roughly 2” (50 mm) wider and 1” (25 mm) taller than the listed pet opening.
The rough opening has to be larger than the pet opening in order to accommodate the entire pet door assembly. RANGER Pet Doors have thick, insulated frames, so the rough opening needed is often bigger than other dog doors with similar pet openings.
The frames of the RANGER door-mounted dog door overlaps the rough opening by ~1/2” (12 mm) on all four sides.
Cardboard Cutout Test
- This sizing method requires a big piece of corrugated cardboard. Start with the pet opening size you think is most appropriate for the pet in mind.
- Cutout either the 6”x10” (small), 9”x13” (medium), 11”x17” (large), or 16” x 23” (XL) pet opening rectangle out of the cardboard up high and fold it at the bottom so that when the piece of cardboard is placed in a doorway, the top of the hole of the rectangle is approximately one inch to an inch and a half higher than your pet, at the withers or shoulders.
- Step on the folded end of the cardboard, and invite your pet through the opening. Watch for clearance high and low.
- If the size of the cutout you try is inappropriate, change to the next size up or down as required. Remember, it is always better to err on the side of being too large.