The large ESB falcon is "roughly" 32" long, and the main hull was constructed from 2, 2 foot (24") wide disks and detailed up. so its "roughly" 24" wide.
The ANH SD. I'm not 100% on the length of that. I saw it in person when it was in Philly and just eyeballing it I'd go somewhere between 3 and 4 feet... But I have not done the math or put a ruler against it. I WISH I had brought a tape measure with me when I photographed all the models - but I guess I'm not that smart... Live and Learn. and BTW that sucker is white... don't let anyone tell you different
The larger one for ESB is noticeably darker in person than the ANH But its still a really light gray... "almost" the same color as the Millenium Falcon.
Just info
Peace,
Jedi Dade