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, 2" (5 cm) for Square Valances.
  • Measure the Width: Place the tape inside the window frame and measure left-to-right at the top, middle, and bottom. Keep it level, record each measurement, and use the smallest one, rounding down to the nearest 1/8" (0.125").
  • Measure the Height: Measure top-to-bottom at left, center, and right inside the frame. Keep the tape vertical; record each measurement. Use the largest measurement and round down to the nearest 1/8" (0.125").
Inside mount measurementTips for Inside Mount
  1. Ensure your window frame has enough depth for an inside mount, with a minimum depth of 1 3/4" (4.5 cm).
  2. Minimum depth requirements: 1 3/4" (4.5 cm) for Cassette Valance, and 2" (5 cm) for Square Valance.
  3. Note that the fabric width is usually about 1 3/16 inch (≈3 cm) smaller than the valance (order width).

How to Measure for Outside Mount

  • Measure the Space: Measure the height above the window where the headrail will be installed, ensuring enough space for the secure bracket and headrail placement.
  • Measure the Width: Adding 3–6 inches (7.6 to 15.2 cm) to the exact width is recommended to cover the entire window and provide maximum light coverage.
  • Measure the Height: Measure the window from top to bottom. Add 3–6 inches (7.6 to 15.2 cm) to ensure full coverage and maximum light blockage.
Tips for Outside Mount
  1. Add 3–6 inches to cover the trim or window, ensuring better light control and privacy.
  2. Outside mounting accommodates brackets and makes the window look bigger.
  3. Ensure 2–3 inches of flat space above the window or frame for secure bracket installation.