How to Measure

First choose whether your blind will fit inside or outside the window recess. Then measure the width and drop in centimetres — the drop is the height of your blind.

Inside the recess

The blind fits within the window opening.

Illustration of a window recess with a teal arrow running level across the top, from the inside edge on the left to the inside edge on the right, showing where to measure the width.

1. Top width

Measure horizontally across the top of the recess, from the inside edge on the left to the inside edge on the right.

Keep the tape level, and record the width in cm.

Illustration of a window recess with a teal arrow running straight down from the top of the recess to the sill, showing where to measure the drop.

2. Drop

Measure straight down from the inside top of the recess to the sill.

Keep the tape straight, and record the full height in cm.

Outside the recess

The blind fits on the wall above and outside the window opening.

Illustration of a navy roller blind fitted outside the recess, with a teal arrow across its full width extending 50mm beyond the window on each side, lined up with the ends of the sill.

1. Width

Measure the full width you want your blind to cover. We recommend a 5cm overlap on each side (shown as 50mm in the illustration), or use the full width of your sill.

Include the overlaps in the width you enter.

Illustration of a window with a teal arrow starting 50mm above the window head and running straight down to the sill, showing where to measure the drop outside the recess.

2. Drop

Start 5cm above the window head (the top of the window opening) and measure straight down to the sill.

Enter that full drop, including the 5cm above.

Before you configure

  • Record your width and drop in cm.
  • Keep the tape level for width and straight for drop.
  • Check your measurements before configuring.
  • For outside fitting, include your chosen overlaps in the measurements you enter.
  • No allowance is added or taken away — your measurements are used exactly as entered.

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Need help? Email info@discountrollerblinds.ie