Fender spec - 1-3/4 inches, same as a Telecaster, Strat, or.... Les Paul Standard.
Gibson has the ES-135, ES-125, ES-137 etc, which are all 2-1/4 inches.
The ES-175, and L4 are 2-3/4 inches.
Cant remember what an L5 is, but it may be 3 or 3-1/4 inches (since it has 17" lower bouts, vs the 16 on the ES-175/L4)
The ES-33x series is more or less 1-3/4