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Custom-Size Dog Doors

When none of the 11 standard sizes fits the animal or opening, a custom configuration may be appropriate.

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Buyer's guide

Choosing custom-size dog doors

Start with the pet, the opening and the conditions around it. Then compare the details that make the installation comfortable, durable and easy to service.

Door Model
Start here

The right custom-size dog doors starts with the project

Start from the needed flap opening, not the frame exterior.

  • The custom-size calculator converts between flap, rough-opening, tip-to-tip and cover dimensions using the manufacturer’s ordering relationships.
  • Custom dimensions should be verified before production.
  • Use decimal inches in the calculator and include the installation type, wall depth and load direction in the order notes.
Kennel Model
Fit and clearance

Fit the pet, then fit the frame

Start from the pet’s required clear passage and a comfortable step-over.

  • The custom calculator translates between dimensional bases using the manufacturer relationships.
  • Measure the pet, determine a comfortable clear opening and compare the complete standard matrix before entering custom dimensions.
  • The calculator converts between flap, rough-opening, tip-to-tip and cover relationships for planning.
Door Model
Installation planning

Plan the installation before ordering

Confirm the custom frame footprint and rough opening with the installer before production.

  • Include wall depth, surface type, frame orientation and load direction where applicable.
  • Custom products demand a custom preflight.
  • Ask the installer to verify the finished wall depth or door construction, the proposed mounting height, the complete rough opening and the outer frame clearance.
Door Model
Ownership and service

Weather, service and long-term use

Custom dimensions still use the selected model, finish and flap package.

  • Oversized pricing above the published table is an area-based estimate and should be treated as such on the order.
  • Save the final approved drawing, dimensional basis, selected configuration and order record with the installation documents.
  • Custom flaps and covers may need the same exact information for future service.
Door Model
Common pitfalls

Mistakes to avoid

Do not enter the hole size as the flap size, mix fractional and decimal notes without verification, or assume a custom frame can ignore structural limits.

  • A strong preflight is deliberately repetitive: measure again, check the dimensional label, compare both faces of the opening and read the exact manual.
  • Confirm that the host door, wall, screen, glass or kennel panel remains safe and functional after the cutout.
Door Model
Order readiness

From a shortlist to an order-ready configuration

Move from shortlist to order only after four checks agree.

  • The pet fits the clear opening; the building can accept the rough opening and full frame; the selected model matches the surface and thickness; and the flap, finish, cover and accessory choices match the intended use.
  • Read the finished configuration back as a complete sentence before approving it: model family, named size or custom dimensions, measurement basis, frame finish, flap count, installation surface, finished thickness and mounting location.
  • Then compare that sentence with the cart, worksheet and installer scope.
Designed around real homes

What a good dog-door decision includes

Label every dimension by its basis
Compare all standard sizes first
Recheck decimals and wall depth
Have the installer verify the frame footprint
Save the approved custom configuration
Installed pet door in a glass patio door
Decision summary

Compare the project from four angles

Primary decision

Use a custom opening only after comparing all 11 standard sizes and deciding whether the required dimension is flap opening, rough opening or frame tip-to-tip.

Fit check

Start from the pet’s required clear passage and a comfortable step-over. The custom calculator translates between dimensional bases using the manufacturer relationships.

Installation check

Confirm the custom frame footprint and rough opening with the installer before production. Include wall depth, surface type, frame orientation and load direction where applicable.

Ownership check

Custom dimensions still use the selected model, finish and flap package. Oversized pricing above the published table is an area-based estimate and should be treated as such on the order.

Ready when the details agree

Find the door that fits the pet and the project.

Use the sizing quiz for a guided recommendation, or return to the products above with your measurements in hand.

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Related dog-door collections and guides

Open the custom size calculatorCompare standard sizes firstReview dimensional terminologyInteractive sizing guideCustom size calculator
Questions, answered

Common questions about custom-size dog doors

What should I compare first when shopping custom-size dog doors?+

Use a custom opening only after comparing all 11 standard sizes and deciding whether the required dimension is flap opening, rough opening or frame tip-to-tip. Custom-Size Dog Doors are appropriate when the animal or an existing opening cannot be served responsibly by the 11 standard flap sizes. Custom should not be the first shortcut around careful measuring. Identify what the submitted width and height represent - clear flap, rough opening or frame tip-to-tip - and keep that basis attached to every note, calculation and installer discussion. A number without its dimensional basis is not an order-ready measurement.

How do I know whether custom-size dog doors will fit?+

Start from the pet’s required clear passage and a comfortable step-over. The custom calculator translates between dimensional bases using the manufacturer relationships. Check the clear flap opening for the pet, the rough opening for the cut and the tip-to-tip frame for the available mounting area.

What should an installer verify for custom-size dog doors?+

Confirm the custom frame footprint and rough opening with the installer before production. Include wall depth, surface type, frame orientation and load direction where applicable. The exact product instructions and selected SKU should be available before any permanent opening is made.

How should I maintain custom-size dog doors?+

Custom dimensions still use the selected model, finish and flap package. Oversized pricing above the published table is an area-based estimate and should be treated as such on the order. Record the model and size, keep moving surfaces clean and replace only verified compatible service parts.

Can I use the sizing quiz before ordering custom-size dog doors?+

Yes. The sizing quiz is a useful starting point because it asks for the pet, opening type, size and weather conditions before pointing you toward a model family.

What if a standard size does not work for custom-size dog doors?+

Use the custom-size workflow after checking the standard size chart. Enter whether the measurement is based on flap opening, rough opening or outer frame so the order and installer are working from the same dimensions.

How do I choose the right pet door size?+

Measure from the floor to the top of your pet’s shoulders and measure the widest point of the body. The flap should generally sit about 1–2 inches above the shoulders, with a comfortable step-over height. Use the actual pet measurements rather than breed averages.

Are these pet doors made to order?+

Yes. Frame color, flap count, size and installation type are selected for your opening. Review the measurements and selected configuration carefully before submitting an order.

Can I replace the flaps later?+

Yes. Replacement flaps, flap kits, magnets, weather stripping, locks and covers are available. Match the replacement part to the original pet-door size and model.