I'll need to see documentation of this because the additional windows and the doubling in crew compliment in dialogue certainly imply the size wasn't increased until later.
Per Shaw, again, the crew doubling was likely a result of the already doubled ship being thought awfully empty. I'd say this is especially true if the carrier comparison pic had been made. (The same sort of mathematics would impact the Galaxy years later as the doubled length led to a doubled complement on a ship with over 27 times the volume.)
Matt Jefferies and the TOS Enterprise...
MJ designed the TOS E--established fact. But I have some question marks in the back of my mind for quite sometime. How much of the E did he design? I ask this only because we have never seen construction drawings of the 11 footer. We have seen numerous sketches and illustrations as MJ...
