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How to Measure Your Pet for a Pet Door

How to Measure Your Pet for a Pet Door

How to Measure Your Pet for a Sliding Glass Pet Door

Pet doors are a convenient way to give your cat or dog access to both outdoors and indoors, even when you’re not home. This is especially helpful to pet owners who work long hours and can’t always let the pets out for bathroom breaks. Having a pet door for cat or dog helps eliminate accidents during housebreaking and can reduce overall training time. It also prevents boredom by providing all the mental and sensory stimuli the outdoors has to offer. Boredom leads to a number of unwanted behaviors like chewing, so an entertained pet means less household destruction.

It’s important to install the correct size door for your pet or pets in order to prevent injury to the animal and undue damage the door. To begin, you will need a tape measure and you will want to measure the largest pet that will be using the door.

Sizing Up Your Pet

Using your largest pet, take the following measurements:

  1. Measure across the widest part of the pet, usually the chest, then add one to two inches to this number for door width
  2. Double-check your width by opening the door this amount, then having the pet step through
  3. Measure from the ground to the highest point of your pet’s back (not the head), usually the top of the shoulders
  4. Measure from the ground to the lowest point on your pet’s underside (in some breeds, this is the stomach, while in other breeds, it will be the chest)
  5. Subtract the low-point number (belly) from the high-point number (shoulders), then add one to two inches to get your door opening height
  6. Rise (how far the pet has to step up to use the door) plus your door opening height should be one to two inches higher than the tallest pet’s shoulder height

Cardboard Test

Before you order your sliding glass pet door, it’s a great idea to confirm your pet’s measurements. In addition to taking all the measurements a second time, you can make an easy mock-up of your dog door. Using your final measurements, draw a rectangle of those exact dimensions on a piece of cardboard or poster board. Make sure the bottom of your rectangle is situated at the same rise height that you want your pet door. Cut out your rectangle, then have a friend hold up the poster board while you coax your dog to step through it. If he fits with no problems, you’re all set to start the installation of your pet door.

Tips to Remember When Measuring Your Pet for a Pet Door

Your dimensions should be large enough to comfortably accommodate your largest pet. They should not have to crouch or stoop to fit through, as this repetitive action can lead to a strain injury to the neck or back. However, your smallest pet should be able to easily see and step through as well, so factor that into your rise height. Keep in mind that as pets age, it may be more difficult for them to step through a high rise. When in doubt, always go with one size larger rather than smaller. For more information on measuring your pet for a pet door or any of Advanced Windows USA‘s services, head on over to our contact page or call us at 801-505-9622.

Download a PDF on how to measure your pet for a pet door.

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Reviews

Lane Gray AvatarLane Gray
Jordan was awesome! He thoroughly explained the window products and the installation process. It’s a pleasure doing business with Advanced Window Products. - 11/21/2025 
Christy Bowen AvatarChristy Bowen
From ordering to install... the whole process was fast, efficient and friendly with no pressure like you receive with so many other companies out there. What a difference our new windows have made with regulating the temperature in our house. We love our new windows. These guys are awesome and would definately recommend for anyone looking to replace their windows. - 11/19/2025 
Callen Crenshaw AvatarCallen Crenshaw
We are so happy we went with Advanced Windows for our window project! The windows are a huge upgrade from our previous ones. They got all of the windows installed in one day. We will be recommending Advanced to our friends. - 11/17/2025 
Chris Peery AvatarChris Peery
Our experience with Advanced Window Products was fantastic! Cassidy, our sales representative was knowledgeable, efficient and everything she said was accurate. The price was well below other estimates we had received but the windows were as good quality if not better and built in Arizona as well. Mario, Martine and Ernesto were incredibly efficient and professional. The old windows were removed and they repaired any casings that were missing as well. Everywhere they worked was left spotless as were the windows. The windows fit like a glove. We cannot say enough about our experience and suggest everyone looking at windows call Advanced Window Products first before making your decision. We are delighted!! - 11/17/2025 
Lanny Badten AvatarLanny Badten
I've been thinking about replacing my windows for awhile now but never quite got around to it. I was in a customers (I'm a handyman) home a few days back and noticed just how much nicer it felt in there since they had replaced their windows with the new energy efficient glass. A few days later a young man came to my door and gave me his sales pitch. Usually I just send them on their way, but somehow I liked his demeanor so I heard him out. Then after talking motorcycles for a bit, I agreed to meet with one of their sales reps. They called the next day and set up and appointment. At the appointed time Cassidy King came by and walked me through how their windows are manufactured and how she would take measurements of all of my windows and then give me a price that would be out the door so to speak. After that they would send out a fellow to take very accurate measurement and then they would build them custom fit to my home. When the build was complete (only a week or two as I recall) they set an installation appointment. Five guys showed up and went to work, positioning each window at the correct place it needed to be. Then they started removing the old windows and then installing the new. Having been in the trades for so many years, I watched them install that first window from start to finish. I was so relieved to see that they did it exactly as I would have done it myself. These five guys worked like a well oiled machine and each one knew exactly what his job was and they did it. It wasn't until they had cleaned everything up that they called it a day.At the end of the day all of the windows had been installed and the difference was felt immediately noticed. I no longer hear the cars that use my street and the F-35's flying overhead are now hardly noticeable. The next day a crew of two came back and trimmed everything out on the inside making everthing look great. I'm now on my third day of enjoying them and I notice that my A/C unit is cycling much less often then it was. Although I don't think I will need it, the lifetime warranty is a nice thing too! - 11/13/2025 
Ayrica Stoneman AvatarAyrica Stoneman
We love our doggie for insert! Chris and his crew did an amazing and quick job of installing. Easy process from start to finish! - 11/11/2025 
Kenny Dahl AvatarKenny Dahl
A Pleasure to work with from start to finish. Ordered my windows in the late summer from Ken and recently had them install by Don & his crew. They did all 11 in 1 day. - 11/11/2025 
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BUY NOW! PAY LATER!

60 Months Interest Free.
$2,500 OFF
With Purchase of 10 Windows.

*expires 12/31/25

GET $2,500 OFF YOUR WINDOWS FOR A LIMITED TIME