http://camerasize.com
I learned today that the same website has something new that allows you to compare the sizes of cameras with various lenses attached. Here are few that I was looking at today with the NEX 7, Olympus OM-D E-M5, and A77. Here is a screenshot of the first one just so you have an idea what the website can do:
The rest of these are all with equivalent or close to the equivalent lens fov.
18-200mm f3.5-6.3, 14-150mm f4-5.6, 18-250mm f3.5-6.3:
http://camerasize.com/compact/#33.89,289.97,31.182,ha,t
18-55mm f3.5-5.6, 14-42mm f3.5-5.6, 18-55mm f3.5-5.6:
http://camerasize.com/compact/#33.88,289.92,31.51,ha,t
55-210mm f4.5-6.3, 40-150mm f4-5.6, 55-200mm f4-5.6:
http://camerasize.com/compact/#33.90,289.95,31.53,ha,t
16mm f2.8, 12mm f2, 10-20mm f3.5:
http://camerasize.com/compact/#33.84,289.91,31.150,ha,t
16mm f2.8, 100-300mm f4-5.6, 70-400mm f4-5.6:
http://camerasize.com/compact/#33.84,289.35,31.55,ha,t
24mm f1.8, 20mm f1.7, 24mm f2:
http://camerasize.com/compact/#33.85,289.30,31.45,ha,t
Of course, you can change the cameras and lenses.