blind type for this roof window?

[scrumbrum12]

Our 1980s extension has a FLAT dome rooflight which we need a blind for to keep out the sun. Can only find velux window blinds which ask for a window code (which ours doesn’t have, not even sure of make). We do ‘t want anything flashy. A blind to fit on the beading near the glass, or a blind to fit lower down in the smooth ceiling section. Has anyone done this? Any ideas? Thanks

Hi, you have https://www.blindspace.com/ who are a little more but a very good system but you probably want https://valeblinds.com they have a flat roof blind that would work and are very well priced. Good Luck

The labels for these windows are usually inside the frame so you see them when you open the window. Are you sure there is no label - Velux, Fakro or otherwise? In any case they are usually standard sizes.

We ended up putting a paper concertina black out blind up there - works a treat and cheap :)