As stated above now we have J-Mac's measurement. Here he is side by side with Charlie Macc. Based on this I think Charlie Macc is around 8 inches.
We also have Eric John's measurement, so I attached him side by side with Bill Bailey, as Bailey has no measurement. That is pretty conclusive to me that Bailey is not anymore than 7", but make of it what you will.
On your first photo, if the white man is 7 inch the black one too, there cock look smililar in lenght