Shade Measuring Instruction

Welcome to our guide on measuring for your new shades! With our easy-to-follow instructions and the use of Measurement Finder, you'll be able to gather accurate dimensions for measuring.

Inside Mount VS. Outside Mount: Which One Should I Choose?

Prior to measuring your windows for blinds or shades, it's essential to determine the appropriate mounting option for your needs. Inside and outside mounts each have their unique advantages and are suitable for various scenarios.

Inside Mount Your Window Treatments When:

  • Adequate depth for an inside mount is essential for your windows.
  • To achieve a streamlined and minimalist look in your space.
  • The window trim should be visually striking and showcased, not hidden.
    You prefer window treatments that integrate smoothly with the wall without extending outward.
  • The windows have robust frames that can accommodate the required mounting hardware.
  • The house is relatively modern, featuring well-proportioned rectangular windows.
  • The window sill juts outward, making an outside mount impractical.

Outside Mount Your Window Treatments When:

  • The window lacks sufficient depth and has an irregular shape, making it unsuitable for an inside mount.
  • The aim is to conceal unsightly window trim and give the window a new look.
    It is necessary for the shades to provide complete light blockage when lowered.
  • The window frame is either too delicate or shallow to support an inside mount.
    Maintaining privacy is crucial, and the shades must prevent outsiders from seeing in when they are closed.
  • The intention is to create an illusion of taller and wider windows.
  • When rolled up, the window treatment should be as discreet and unnoticeable as possible.

Measure the Window for Inside Mount

① Measure the Depth
Measure the depth at the top of the inside window casing to ensure adequate space for a secure inside mount. This measurement will also determine if a flush mount, where the product sits within the window frame without protruding, is possible. A minimum depth of different shades varies, kindly check the format below for the information of depth requirements for different shades, which is necessary for an inside mount.
② Measure the Width
For Shades: Due to potential irregularities in window shapes, it is recommended to measure the window at three places: across the top, middle, and bottom. Round each measurement down to the nearest 1/8 inch.
③ Measure the Length
To determine the length, also measure the window in three locations: across the left, center, and right. Round each measurement up to the nearest 1/8 inch. Use the largest of these measurements as your ordering length.

Note on Deduction

To ensure the shade fits correctly, take the smallest of these measurements and consider deduction requirements to get the final width measurement.

  • For Roman Shades and Bamboo Shades, headrail width = ordered width (after deduction 3/8 inch from window frame)

Note on Side Gaps

Slight gaps on both sides of shades exist because the shade material is slightly narrower than the headrail. This design allows the shade to roll up and down smoothly without obstruction.

  • For Roman Shades and Bamboo Shades, Fabric Width = Ordered Width

Tips for Inside Mount


  • Confirm if your window has enough depth for an inside mount. If not, no worries! You can switch to an outside mount or explore other suitable products.
  • Examine the window frame or casing to make sure it’s strong enough to drill into directly.

Measure the Window for Outside Mount

① Check the Space
Measure the height above the window for mounting the headrail and ensure there's enough space for secure bracket and headrail installation.
② Measure the Width
Measure the window's width from edge to edge. Optionally, add 2-4 inches (1-2 on each side) to reduce light leakage. Use this adjusted width for ordering.
③ Measure the Length
Measure the window's height from edge to edge. For optimal exposure and to account for the shade's stack height when rolled up, mount the shade 10-12 inches above the frame if possible.

Tips for Outside Mount

Allow Extra Space: Include space for the headrail and brackets when measuring. Add extra width to cover trim or at least 4 inches for light control and privacy.
Enlarge Window Illusion: Extending blinds beyond the window frame creates a larger appearance and enhances the room's grandeur.
Check Mounting Space: Ensure there's a flat surface of at least 2 inches above the window for mounting brackets.
Consider Projection Brackets: If window molding interferes with blinds, projection brackets can extend them away from the frame for clearance.