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Can't Measure Your Dog? Check Out This Dog Door Size Reference Chart

Whether you’re getting an in wall dog door or a pet door for sliding glass doors, it’s vital that your new doggie door is the proper size. However, it can be difficult to know what doggie door size is best for your canine friend. If a dog door is too small, it can be uncomfortable for your dog to use as well as cause injuries. However, large breed dog doors require more precious space.

That’s why we’ve compiled a dog door size chart for 20 of the most popular dog breeds in America. With this easy reference, you can now tell how big of a dog door flap you will need when purchasing any Endura Flap pet door.

Three dogs sitting down and looking up at the camera

How Does It Work?

Unlike mutts, it’s easy to predict how tall a purebred dog will grow. Using the average heights of a dog breed, we can estimate how big of a step-over you will need and what door size we recommend.

The top of a properly fitted dog door should be at least 1” above the highest point of your dog’s back. While this guide is a helpful reference for narrowing down your choices, we recommend measuring your dog to ensure the best fit. After all, your dog is unique and may require unique doggie door specifications.

Recommended Pet Door Size Based on Dog Breed

Dog Breed


Recommended Step-Over

Recommended Door Size

Retrievers (Labrador)

22.5-24.5 inches (male), 21.5-23.5 inches (female)

4-7 inches (male), 3-5 inches (female)

Large (both)

French Bulldogs

11-13 inches

2-3 inches


German Shepherd Dogs

24-26 inches (male), 22-24 inches (female)

2-4 inches (male), 4-6 inches (female)

Extra Large (male), Large (female)

Retrievers (Golden)

23-24 inches (male), 21.5-22.5 inches (female)

5-6 inches (male), 3-5 inches (female)

Large (both)


14-15 inches

4-5 inches


Poodles (Standard)

18-24 inches

2-5 inches



14-16 inches (male), 13-15 inches (female)

3-6 inches



24-27 inches (male), 22-25 inches (female)

2-5 inches (male), 4-7 inches (female)

Extra Large (male), Large (female)

Pointers (German Shorthaired)

23-25 inches (male), 21-23 inches (female)

1-3 inches (male), 3-5 inches (female)

Extra Large (male), Large (female)

Dachshunds (Standard)

8-9 inches

1 inch


Pembroke Welsh Corgis

10-12 inches

2 inches


Australian Shepherds

20-23 inches (male), 18-21 inches (female)

2-5 inches (male), 1-3 inches (female)

Large (both)

Yorkshire Terriers

7-8 inches

1 inch



23-25 inches (male), 21.5-23.5 inches (female)

1-3 inches (male), 3.5-5.5 inches (female)

Extra Large (male), Large (female)

Great Danes

30-32 inches (male), 28-30 inches (female)

8-10 inches (male), 6-8 inches (female)

Extra Large (both)

Siberian Huskies

21-23.5 inches (male), 20-22 inches (female)

3-5.5 inches (male), 2-4 inches (female)

Large (both)

Cavalier King Charles Spaniels

12-13 inches

2-3 inches


Doberman Pinschers

26-28 inches (male), 24-26 inches (female)

4-6 inches (male), 2-4 inches (female)

Extra Large (both)

Miniature Schnauzers

12-14 inches

2-4 inches


Shih Tzu

9-10.5 inches

1 inch



Every dog is unique. While this chart is a helpful reference, we highly recommend measuring your dog yourself in order to ensure the best fit. You can check out our guide on how to measure your dog for a pet door.

Diagram showing how to measure your dog for a pet door

We recommend testing the dimensions of your dog door flap to guarantee that it fits. To do that, cut out a square in a piece of cardboard that is the dimensions of your dog door. See the chart below to see what the dimensions of each dog door flap is:

Flap Size

Flap Dimensions


6" w x 11" h


8" w x 15" h


10" w x 19" h

Extra Large

12" w x 23" h

Make sure to factor in your step-over. Your step-over is the distance between the bottom of the flap to the ground. For example, if you have a step-over of 3 inches, make sure that there are three inches of cardboard between the hole you cut and the ground.

Now have your dog walk through the cardboard hole. Check to see if they can do it with ease and without touching the top or sides of the hole. If they can, then the dog door size is a match! Otherwise, you should remeasure your dog and test out a different dog door size or step-over height.

With these tips, you should be able to find the Endura Flap pet door that best fits your dog. If you don’t have a purebred dog or just prefer mutts, check out our guide on how to predict how big your puppy will be.

Mia Daniele

Written by

Copy Editor

Pets: I have a fluffy, 14 year old chow-collie mix with red fur named Rosso. He's very stubborn and has the standoffish personality of a cat.
Fun stuff: I am a hot chocolate connoisseur.

Copy Editor

Pets: I have a fluffy, 14 year old chow-collie mix with red fur named Rosso. He's very stubborn and has the standoffish personality of a cat.
Fun stuff: I am a hot chocolate connoisseur.

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