Measuring for a rollerblind with a cord pull for a bay window
Gather your tools
You will need:
- Two A4 or A5 sheets of paper or card
- A pencil
- A metal tape measure
- A ruler
Step 1 – Determine the size of the roll
First you will need to know approximately which diameter size the fabric roll of the mounted roller blind will have. Please use this Determine the approximate size of the roll of the roller blind by using the table on the right.

Step 2 – Determine the angle
Then you need to determine the angle of the bay windows, making sure that the roller blinds can hang nicely side by side.
Take the two pieces of paper, and place them next to each other, edge to edge.
A. Use a pencil to make a marking on them based on the diameter size of the roll. If the diameter roll of your roller blind will be approximately 10 cm, you will have to use the ruler to make a 10 cm mark with a pencil.
B. Then place the two sheets of paper next to each other, but angled along the window sill of the bay. When the pencil markings meet, use the pencil to make a small mark on the window sill where the edge of the paper meets the window frame.
Copy this procedure along all the bay windows.


Step 3 – Measure the roller blind width
C. Then measure the distance between each two drawn pencil markings on the window sill. The gap between the two markings will establish the working width of the roller blind. This final width measurement should be used when ordering the roller blind with a cord pull.

Step 4 – Measure the roller blind drop
Measure from the top where the blind will be installed down to your desired end point (typically the window sill). Please measure all around the bay, especially in older windows these measures might differ. We advise to add 10 cm to this measure, as it gives the roller blind some weight in the bottom of the blind, making it easier and more steady to roll up and down. The final height measurement should be used when ordering the roller blind.
Step 5 – Ordering the roller blinds
Enter the final width and height measurements taken from step 3 and 4, when ordering the roller blind on our website.
Please double-check all measurements before placing your order to ensure a perfect fit!
Please also read our faqs page for general questions about the product.
If in doubt, please contact us for guidance.