Three quick measurements and we'll tell you exactly what fits — no guessing, no return trips to the garage.
Door type
Thickness
Cutout size
Result
STEP 1 OF 3
What kind of garage door do you have?
This changes where your insert sits and how it's measured.
Sectional (panel)
Folds upward in horizontal sections — most common type
Roll-up / ribbed steel
Rolls into a single coil — common on commercial buildings
STEP 2 OF 3
How thick is your door?
Measure straight through the door panel — glass and frame combined, not just the metal skin. If your door is hollow/non-insulated (a single layer of steel), measure that single layer.
Thickness is the short dimension — how far the door sticks out front-to-back, not how tall or wide it is.
inches
Common sizes: 1 3/8", 1 3/4", 2". Round up if you measure in between.
Affects which frame depth you need — not required to continue.
STEP 3 OF 3
What size opening do you want?
Measure the cutout you want the window to cover — height first, then width. If you're replacing an existing window, measure the existing opening, not the old frame's outer edge.
in
in
Enter fractions as written, like 13 1/2 — no need to convert to decimal.
