For a perfect fit, you need to discover the reference on the window plate at the top of the window. You will need to record this information for the order process.

Find the right size blind for your roof window

The above illustration shows a VELUX window plate. The window plates differ in appearance depending on the model of your window. Most of the roof window manufaturers will have a plate on their windows, showing the window type and size. Please identify the version of data plate on your window. To order a blind you will need to specify: Window type and window size. E.g. GGL M08 as above.

Can't find the code for your VELUX Roof Window?

Use this handy reckoner to locate your code according to window size.Use this chart to find the size code for your window.

Find the right size for your Keylite Roof Window

The exception is Keylite, who has a plate but who chooses to show a production number, the intention being that you then phone or mail to get the window size. We have therefore included a chart on our site where you can check the glass size and order the comparable RoofLITE size for a perfect fit.

To view the chart please click here.