Guide to VELUX Window Sizes

For more than 70 years, VELUX have combined gorgeous styling and innovative technology in their range of popular roof windows. Each of these VELUX windows transform living spaces, whether it be a small entrance area or large family kitchen.
Whether you’re replacing an existing roof window or introducing one for the first time, finding the perfect size for your project can be a challenge. This is especially if you’ve never shopped for a roof window before.
VELUX have made it incredibly simple to find the right window for your project, whether it be a small 55cm x 78cm centre pivot or large 134cm x 140cm top hung window. For added convenience, here is a quick guide to VELUX window sizes.
What Are the VELUX Window Size Codes
Below is a chart showing the corresponding code for each size of VELUX window. Each merchant should recognise these codes and be able to point you in the right direction. However, remember that there may be additional characters depending upon the size, frame style, glazing option and opening type. But the standard code (i.e. BK04) should always be present.
How to Find Your VELUX Window Size
If you’re replacing an existing VELUX window and require the same size, it’s easy to find the corresponding code. This is as every window manufactured after 1968 features a plate in the top right-hand corner of the frame, meaning it can’t be seen when your window is closed.
The code located on this plate shows the size, frame style, glazing option and opening type of your window. In most circumstances this will align with current models and, if not, our team will be able to help you find a suitable replacement window.
Remember that the frame style, glazing options and opening type doesn’t need to be the same if replacing an existing VELUX window. You will simply need to ensure that the size is the same. For example, a GGL MK04 3070 could be replaced with a GPL MK04 2066.
Shop VELUX Windows Without a Code
Roofing Megastore aim to make buying a roof window non-technical. We therefore allow you to configure your roof window rather than having to hunt through hundreds of variations. It couldn’t be any simpler!
For example, when viewing our VELUX Centre Pivot Roof Window you can select your frame colour, window size and window glazing from easy to use dropdowns. If you add the item to your basket, you will see the code for reference.
Therefore, if you know the size of your window (i.e. 55cm x 98cm) you can just select it from the dropdown on each of our roof windows. There is no need to find and search for your code as you would when shopping elsewhere.
Help Finding Your VELUX Window Size
Alternatively, simply speak to our team online or by telephone. Let them know the size you need and they’ll talk through each of the options. You’ll no longer be left bewildered by VELUX window sizes and options.