measure length

Now that I have your attention, this is not going to be your usual "am I big enough?" type of post. I have some general questions about how to account for a curve when measuring my dick. I have a decent left curve in my cock, and if I don't account for it, my dick comes at around 5.5-6 inches...

Long story short if I measure my penis on the top from the head down its around 6 I inch long but if i where to measure it from the underside bone pressed from the head down then it's nearly 7?

Been trying to find the source of these GIFs for a while now. Nothing hotter than a big cock getting measured on cam!!! as