Well, it might have been fun that way but it sounds like a very inaccurate way to measure. Try the good old fashioned way... with a tape measure or a ruler
http://www.lpsg.org/gallery/showphoto.php/photo/69507/cat/500/ppuser/178446.
I once helped a friend out by letting him sleep on my living room floor one night. He settled into his sleeping bag and I got up the nerve and invited him to come sleep with me. When he pulled it out I was dumbfounded. I was almost scared to try it but at the same time was way too eager to put it in me. He tried to tell me that I needed to be wetter but I was convinced I was ready and put it in. It hurt. I did not get wetter (like I usually did) I just couldn't take it and he finished up by jerking off for me. I was 20 and I've always wished I could get another chance at that monster, but he wouldn't go for it.
My hand is exactly 7.5 inches from the tip of my middle finger to the line at my wrist. This man was about the size of my arm... which BTW is 9.5 inches from elbow to the line at my wrist. I've seen more than my fair share of cocks and his was by far the largest ever... somewhere between 9 and 10 inches and very fat. Everything else I've seen was 8 or under with all the recent ones being 6 or under :crying: but at least that 5.5 upward curve hit the g-spot straight on.
When I see posts where men are claiming to be 12 inches I just ignore them unless the pics are so badly edited that it is annoying. When women say that they boyfriend was 10 inches or 12 inches, I just assume they don't know the difference - or they think a man is supposed to measure from the asshole, up over the balls, and up the bottom side of the dick to the tip.