Well, that is one version! I have used 2 different 4x5 films and. neither were glass plates. One was the size of the sheet film that came from the manufacturer for you to put in your film holders. The other size came from film packs and were larger. The situation was the same for 2 1/4 x 3 1/4 films except there was a third size, those negatives that came from 120/620 roll film. Most enlarger manufacturers made negative holders in the different sizes. That was in the "golden age of photography that some of this group talks about.........Regards!