Ever try a 2011?
Dimensionally they are almost identical to a 1911 w standard grips. (Fore to aft/side to side) but they do fill the hand a little more.
People don't realize how much of the grip width of a standard 1911 is "optional" width from the thick, rounded profile of the standard 1911 grip panels (or stocks as some call them). So there's a good deal of "slack" that can be turned to the purpose of adding internal magazine space. But the frontstrap and backstrap do get quite a bit wider.
Some people (myself included) actually like that, since it spreads the recoil force over a wider area at the rear.