When I was a teenager, most of my friends at one time or another masturbated together and I saw a lot of hard dicks. The hard penis length did not seem to have much to do with height or weight comparisons. My cousin at 5'5" had over 9 inches hard while I was 6'3" and had over 8" and my brother was same height as I was and had over 6". One skinny guy about 6' had 10 inches and his buddy at 350lbs and 5'8" had 10 inches also. Many guys at 5 to 6' had 5 to 6" hard-ons. One friend at 5'7" had about 5.5" hard but extremely thick. An uncle at 5'5" had about 8" hard-on. A lot of my buddies around 6" plus or minus an inch claimed they had about 6 inch hard-ons, defininely smaller than mine as they claimed.
At one school, we had periodic dick measuring contests and we all knew how long each other was because we had to get hard and be measured by others as a lot of guys looked on the proceedings. The two guys mentioned above with 10 inches were always the largest, both in length and in girth. They made all of us smaller fellows measure them and thereby, feeling their giant dicks. All of us smaller guys always thought we would grow to be as large when we were older. It was something we had to look forward.