I don't think Geneva needs an introduction on this forum, they are one of the best shirtmakers around.
I am selling 3 of my shirts as I have run out of room in my closet. I have worn these once or twice at the most, in fact I think I didn't wear a couple of them at all.
Neck is a 15.5", sleeve length is 35". P2P is 22", shoulder is 18.5". I am about a 40 suit for reference and 34" waist. The fit is on the slim side, but not overly restrictive by any means.