Approx 220 X 60 cm.
These still have most of the sliding door fixings on them, and doubtless you could buy replacements, or else just use them as they are.
I have, however, used them of late just as long wall mirrors, floor to ceiling. (I had a length of 2x2 wood attached on either vertical side, and then that was attached to the wall.)
They are plastic surrounded; maybe could carefully be removed?
You can have one or (preferably) both.
Collect from Langwathby, or I can maybe deliver locally.