How to Measure Roller Shades

How to Measure for Inside Mount

  • Measure the Depth: Measure your window frame for an inside mount. Minimum depth required: 1 3/4" (4.5 cm) for Cassette Valances and 2" (5 cm) for Square Valances.
  • Measure the Width: Place the tape inside the window frame and measure from left to right at the top, middle, and bottom. Keep the tape level and record each measurement. Use the smallest measurement and round down to the nearest 1/8" (0.125").
  • Measure the Height: Measure from top to bottom at the left, center, and right sides of the window frame. Keep the tape vertical and record each measurement. Use the largest measurement and round down to the nearest 1/8" (0.125").
Inside mount measurement
Tips for Inside Mount
  1. Inside mounts can be installed using either a top mount or a side mount. Top mount is the default option when placing an order.
  2. For the default top-mount installation, the factory will make a small deduction of approximately 1/8" (3.2 mm) from the ordered width to help ensure a safe and proper fit.
  3. If you prefer a side-mount installation, please specify “Side Mount” in your order notes. Otherwise, we will be unable to make the necessary adjustments, which may result in installation issues.
  4. Check whether your window frame is bowed inward or outward. If it is, measure the narrowest width and use that measurement when placing your order. Otherwise, the shade may not fit inside the window frame.
  5. Ensure your window frame has sufficient depth: 1 3/4" (4.5 cm) for a Cassette Valance and 2" (5 cm) for a Square Valance.
  6. The fabric is typically about 1 3/16" (approximately 3 cm) narrower than the valance and ordered width.

How to Measure for Outside Mount

  • Measure the Space: Measure the space above the window where the headrail will be installed. Make sure there is enough flat space for secure bracket and headrail installation.
  • Measure the Width: We recommend adding 3–6 inches (7.6–15.2 cm) to the exact window width for full coverage and improved light control.
  • Measure the Height: Measure the window from top to bottom and add 3–6 inches (7.6–15.2 cm) for full coverage and maximum light blockage.
Outside mount measurement
Tips for Outside Mount
  1. Add 3–6 inches to cover the window or trim for better light control and privacy.
  2. Outside mounting provides more room for the brackets and can make the window appear larger.
  3. Ensure there is 2–3 inches of flat space above the window or frame for secure bracket installation.