This is an intersting topic - My large cock hangs down when I'm standing-up with a right curve.
I use a tape measure because my cock curves to the right. When I use a straight ruler to measure myself, as the "so called rules" say your supposed to do, my length is reduced to 9.2-inches. But when I use the tape measure on top, as my photo gallery shows for example, I clearly hit 10-inches - Now if a man has a completly straight penis, then a straight ruler measurement is accurate. There are some guys on LPSG that don't want to accept my tape measured photos as evidence that truly shows my 10-incher as legit... but so what, I'm not here to impress, I'm here for LPSupport, as a group of large sized men with common interests and problems.
My point being is that men who have an upward curve, should use a tape measure and start from the base on the underside of your penis to start your measurement, and that will be your size... Don't stress-out by the negative comments on other thread topics that people make here about your measurements not being accurate, or not done "by the rules" or its been photoshopped and all sorts of discouraging remarks and statistics... be proud of what you possess - Just remember dudes, we're here for support and for sharing common issues because we're large guys!