How to Measure for Blinds and Shades

Quick Guide to Measuring for Window Shades

Measuring for window shades accurately is crucial to ensure a proper fit and a polished look. Follow these steps to measure your windows for both inside and outside mounts.

Tools You'll Need:

  • Measuring tape
  • Pencil and paper
  • Step stool or ladder (if necessary)

Measuring for Inside Mount Shades

  1. Width Measurement:

    • Measure the inside width of the window frame at the top, middle, and bottom.
    • Record the narrowest measurement. This ensures the shade will fit within the frame without obstruction.
  2. Height Measurement:

    • Measure the inside height of the window frame from the top to the sill at the left, middle, and right.
    • Record the longest measurement. This ensures the shade will cover the entire height of the window.
  3. Depth Measurement:

    • Measure the depth of the window frame to ensure it can accommodate the shade hardware.
    • Verify the shade's depth requirements for the specific shade you are purchasing.

Measuring for Outside Mount Shades

  1. Width Measurement:

    • Measure the width of the area you want to cover. This is typically the window frame plus additional overlap on each side (usually 2-3 inches on each side for better light control and privacy).
    • Record this measurement.
  2. Height Measurement:

    • Measure the height from where you want the top of the shade to start (usually above the window frame) to where you want the bottom of the shade to end (usually below the window sill or to the floor).
    • Record this measurement.
  3. Additional Considerations:

    • Ensure there is enough flat surface around the window to mount the shade hardware.
    • Consider any obstructions like window cranks or handles that might interfere with the shade's operation.


  • Double-check all measurements for accuracy.
  • Always use a metal measuring tape for precise measurements.
  • If you're installing multiple shades in one room, measure each window individually, even if they appear to be the same size.

By following these steps, you'll ensure your window shades fit perfectly, enhancing both functionality and aesthetic appeal.