How to Measure Window Blinds

Before You Start

Measuring for custom blinds is simple if you slow down and write the numbers carefully.

You will need a measuring tape, pencil or pen, paper or phone notes, and a step ladder if the window is high.

Measure in millimetres if possible because it gives better accuracy.

Choose Your Fit Type First

Recess Fit / Inside Frame: The blind sits inside the window frame for a clean built-in finish.

Face Fit / Outside Frame: The blind sits outside the frame or on the wall, giving more coverage and better light control around the edges.

Frameless / No Frame: Use this when there is no proper recess frame and the blind needs to be fixed on the surface around the window.

Recess Fit Measuring Steps

Check that there is enough depth for the blind system. The current roller blind guide mentions at least 50mm depth for recess fitting.

Measure the inside width of the window at the top, middle and bottom. Use the most suitable exact measurement as guided on the product page.

Measure the height/drop from top to bottom.

Check for handles, grills, winders or obstructions that may affect blind movement.

Choose the control side that is easiest to reach.

Face Fit Measuring Steps

Decide where the blind will sit above or outside the frame.

Measure the width you want the blind to cover.

Measure the drop from the top fixing point to where the blind should finish.

Face Fit is useful when you want better coverage or when recess depth is not enough.

Frameless Measuring Steps

Mark the surface where the brackets can be fixed safely.

Measure the width and drop of the area you want covered.

Make sure the control side is clear and easy to use.

Final Checklist Before Ordering

Width checked twice.

Drop/height checked twice.

Fit type selected correctly.

Control side selected correctly.

Fabric and colour selected after checking sample if needed.

Minimum billable area and minimum height/drop rules remain as configured on the product page.