In my aborted plans to tackle these these I settled on 4x10 as well. It's hard to get the actual exact short side dimension from that blue PADD auction so picking a round number seemed reasonable...
I will need to look through my reference to remember why I decided the desk PADDs were the same size as the other clear PADDs... maybe they were next to each other on a table at one point. Something similar to the screenshot that Nick posted in post 60. Picard sets the blue one next to the orange just after this shot in Best of Both Worlds, IIRC:
But the image in post 60 is probably a better confirmation of similar sizing.
I love that "isolinear module" thing. It really is everywhere, especially in early seasons. There's also a larger version:
Where'd you find the graphic, Ryan? Excellent identification! @kertratz sent me some later art with a similar style but more detailed design (you see it on the walls of the Jefferies tube junctions for example... I think it's reproduced in the tech manual). The later graphic seems to take inspiration from this older one. It's great we have a clear view of it at last.