You ALWAYS measure the dorsal side of the penis for ALL measurement whether flaccid or erect. Start at the Pubic Bone (feel for it), pull the foreskin back and measure. Simple.
Thanks for the tutorial man it was great. Was that you like fully un fluffed flaccid? Cause haha bro if so your softie is bigger than my hardest boner. Sharing this with my squad so they can learn how to measure their cocks correctly. Wonder if any of my friends are bigger than you. I doubt it