Patio Pet Door Conversion System
Sizing: The chart below gives general size suggestions based on weight. The combination of rise and pet opening width and height will determine your pet's ease of use.
How high should the pet opening be?
You will want the top of the pet opening to be approximately 1-2 above the high point of the tallest pets back. This will reduce wear on the flap. Example: a medium pet door with a minimum rise of 6 added to the opening height of 11 will total approximately 17. This will work well for pets 15" to 16" tall measured at the high point of the back.
How low to the floor should the pet opening be?
If you have several pets, it should accommodate the smallest pets ability to see through. With larger pets, keep in mind an appropriate rise that will allow for ease of use now as well as in the future as they grow older and slow down with age. As noted above, rise plus opening height should total 1-2 above the tallest pets back. Don't be afraid to order a larger (taller opening) door if you need low rise (step over) and additional height for clearance.
How big should the opening be?
The pet opening should allow your pet to pass through comfortably. The chart below has opening flap dimensions. If in doubt, create a cardboard opening for your pet to step through using the opening sizes noted below.
Take a look at the official Pet Door Design How to Measure & Install Video Presentation.
Sizing Guide
Rise plus net opening height should total 1"-2" above the high point of the tallest pet's back
| Size | Net Opening | Pet Weight | ||
| Small | 5"X7" | Up to 12 Pounds | ||
| Medium | 8"X11" | Up to 40 Pounds | ||
| Large | 10"X15" | Up to 100 Pounds | ||
| X-Large | 13-3/4"X23" | Up to 220 Pounds |






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