
How to Measure Exterior Shutters
Carefully and accurately measuring each window will ensure a proper fit for your new shutters. Since there is no such thing as a standard size window (even for newer homes), we will walk you through the process to a successful measurement outcome. No matter if your shutters are operational (open and close over the window) or not, a successful measurement is the first step in beautifying and securing your home with Aegis Shutters.
Gather your supplies: tape measure, paper, and pencil.
Always measure from inside the window casement as if your shutters will open and close even if your shutters are simply decorative.
Measure the window width from inside the window casement in three locations...near the bottom, the middle, and the top. Take the smallest of the three measurements.
Measure the window height from inside the window casement in three locations...near the left, middle, and top. Take the smallest of the three measurements and write it down.
Now, we measure for our horizontal shutter framing which normally matches the window framing for a complementary look. Simply measure up from the bottom to the center of your “break point” and write down this measurement. If you want a second or third break point, measure from the bottom again and write down those measurements.
Write down your exterior wall texture (i.e. stucco, siding, brick, etc)
Note if the shutters will be operable (open and close) or not.
Highly recommended: Take a photo of the window to include with your measurements.


How to measure a square window
(or opening)

Gather your supplies: tape measure, paper, and pencil.
Measure from the center of the bottom of the window casing to the center of the top of the window casing. This will be your "high point".
Measure from the lower left of the window casing up to the point where the the radius begins. Do this again on the right side then take the smallest of the two measurements. This will be your "low point".
Measure the window width from the outside edge of the left trim to the outside edge of the right trim. Measure in three locations. First from the bottom, second from the top and third from the middle. Take the smallest of the three measurements.
Now, we measure for our horizontal shutter framing which normally matches the window framing for a complementary look. Simply measure up from the bottom to the center of your “break point” and write down this measurement. If you want a second or third break point, measure from the bottom again and write down those measurements.
Note the texture of the exterior wall (i.e. brick, stone, siding, etc)
Note if the shutters will be operable (open and close) or not.
Highly recommended: Take a photo of the window to include with your measurements.
How to measure a radius top window
(or opening)


Helpful tips for measuring
If your exterior shutters are non-operational (do not open and close), then you can round measurements to the nearest 1/2 inch.
When ordering, specify measurements for each window as
Height = xx in
Width = xx in
Break Point = xx in
For radius tops:
High Point = xx in
Low point = xx in
Consider any obstructions near the window (lights, downspouts, etc.) that might interfere with shutter installation or operation.
If your window has a protruding sill or window box, measure how far it extends from the wall to ensure proper clearance for the shutters if they are going to be operational.
Take pictures of each opening where you would like your shutters to include with your quote request.



Aegis Shutters
Enduring Elegance Since 2000
Shutter Styles
© 2025. All rights reserved.
Call or Text at (504) 264-2999
555 Hass Rd
Pearl River, LA 70561
hello@aegisshutters.com