I've played a few but cant really say about the size...you could probably go to a manufacturer's website and find specs, but really I think its more about what you like and are comfortable with. You still have to accommodate at least 4 strings regardless so how much different could it really be?
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Overall length = 30"
Scale length = 19-1/4"
Depth = 3"
Bottom Bout = 10-1/8"
Top bout = 7-1/2"
Nut width = 1-1/2"
Not complete, but working with the nut width you could easily take a good guess at the rest.