How Do I Measure My Pet For A Pet Door?

To choose the right pet door size, you'll need a tape measure and your pet (preferably not napping). 

1. Measure Width

Measure the widest part of your pet, usually across the chest or hips.
+ Add 50mm / 2 inches for clearance.

2. Measure Height

Measure from the bottom of your pet’s chest or belly to the top of their shoulders (whichever is tallest).
+ Add 50mm / 2 inches to ensure they have enough room to walk through comfortably.

3. Measure Step-Over Height

Measure your pet’s step-over height — the distance from the floor to the bottom of their chest or belly.

This measurement helps determine the most comfortable and accessible height for your pet to step through the door opening, whether you’re installing a standard cut-in pet door or a fixed-height model like the Patio Pet Door range.

• Add approximately 50mm (2 inches) to this measurement to ensure your pet has enough clearance to walk through comfortably.

If you have multiple pets of different sizes, consider sizing up the pet door to accommodate the largest pet while keeping the step-over manageable for smaller ones.

4. Choose Your Pet Door

Use your measurements to select the pet door that gives your furry friend enough wiggle room.

Tip: When in doubt, size up - nobody likes squeezing through tight spaces (pets included).