Measuring Guide

Three Measurements.
That's All You Need.

Follow three easy steps to get the perfect fit on the first try.

✓ Every order is custom made from your measurements
↺ If the fit isn't right we'll remake it for free
✉ Not sure? Reach out for support in the chat

Before You Start

Lights Out mounts inside your window recess using a compression frame. Accurate measurements make sure the frame fits snug and seals out every bit of light.

What You'll Need

📏 Metal Tape Measure
✏️ Pen & Paper
🕑 5 minutes
Step 1

Measure Your Window Depth

The compression frame needs at least 1.2 inches (3 cm) of clear depth inside the recess to mount securely.

  1. Measure from the front edge of the recess straight back — to the glass, or to the nearest obstruction (handle, lock, trickle vent).
  2. 1.2" (3 cm) or more? You're good to go.
Close Call?
Between 1" and 1.2"? Send us a photo of the recess — we may still be able to make it work. Email support@golightsout.com.
Step 2

Measure the Width

Windows aren't always perfectly square. Three measurements catch any variation so nothing gaps.

  1. Measure wall to wall at the top, middle, and bottom of the recess.
  2. Give us the smallest of the three.
Don't Deduct Anything
Give us the exact measurement — we make the deductions when we cut your blind.
Step 3

Measure the Height

Same logic. Three spots, smallest number wins.

  1. Measure top to sill on the left, center, and right.
  2. Give us the smallest of the three.
Measuring to the Sill
Measure to the top surface of the sill, where the blind will rest.

Easy Mistakes to Avoid

Small errors lead to light leaks. Here's how to get the best fit.

📐
✗ Tilted tape
✓ Straight & level

Tilting the tape even slightly inflates the number. Keep it flat and parallel to the surface.

🔀
✗ Bent tape
✓ Flat against the wall

A tape that bends or curves gives a shorter reading. Press it gently against the recess wall.

🔢
✗ Rounding up
✓ Nearest 1/16"

Round to the nearest sixteenth of an inch. When in doubt, go with the slightly smaller number.

Common Questions

What if my window recess isn't perfectly square?
That's normal — most windows aren't. That's exactly why we ask for three measurements in each direction. The smallest number ensures the frame fits everywhere without forcing or gapping.
Do I need to account for handles or locks in my width/height?
Handles and locks only affect the depth measurement (Step 1). For width and height, measure the full recess opening wall-to-wall and top-to-sill — ignore any hardware that protrudes inward.
What if I mess up the measurements?
We've got you. If your blind doesn't fit because of a measurement error, we'll remake it free of charge. No fine print, no arguments. That said, double-checking takes 30 seconds and saves you a few days of waiting.
I have multiple windows — do I need to measure each one?
Yes. Even windows that look identical can vary by a quarter inch or more. Measure each one individually for the best fit.

Got Your Numbers?

Enter your measurements at checkout. We cut your blind to fit — delivered to your door.

Shop Lights Out Blinds →

Still Not Sure?

Send us your measurements or a photo of your window and we'll confirm everything before you order.

support@golightsout.com