These are Length x Width. I got these from a mod site, so I can't link there.
City Hall: 47x20
City Hall (Riverview): 31x20
School: 34x20
School (Riverview) 34x20
Hospital: 33x25
Hospital (Riverview): 33x25
Bookstore: 10x13
Business Office: 21x21
Business Office (Riverview): 21x21
Mausoleum: 6x8
Mausoleum (Egyptian): 6x8
Mausoleum (Chinese): 6x8
Military Base: 39x39
Military Base (Riverview) 39x39
Supermarket: 12x15
Diner: 18x9
Bistro: 13x14
Stadium: 48x31
Stadium Sign: 7x2
Science Dome: 51x58
Science Building: 35x20
Science Building (Riverview): 35x20
Criminal Warehouse: 20x22
Police Station: 18x18
Theater: 16x26
Day Spa: 14x12
Radio Tower: 18x19
Satellite Dish: 12x10
Water Tower: 19x18
Water Tower (Riverview): 19x18
