I'll weigh in a bit...
First off, I've only ever measured my hand side-to-side (thumb tip-to-pinky tip when I'm spreading my hand as wide as possible).
I've found that my hand is 9" wide. Not sure about measurement from wrist to middle finger tip, but if I had to guess, I'd say about 8"
I'm 6-1 and most of the men on my father's side are taller - typically in the 6-4 range for uncle and cousins and grandfather. My mother is tall, though her relatives aren't usually taller than 6-2.
All through HS, i couldnt get off my 145lb weight. Yes, I was extremely lanky. But I also played soccer so at least I was fit and had a strong lower body. Upper body was scrawny.
When I got to college, I more or less filled out. I've been my current 170-175 since about sophomore year.
My shoe size is 13 (US). I don't pay attention to how wide it is, but hte regular size 13s fit me, so I guess I have a narrow foot. My brother has a flat arch. Speaking of my brothers, both are taller than me. The tallest is probably 6-3 and much heavier than me and only a junior in HS.
I don't know about their dick sizes, so don't ask. I've seen dad flaccid but it was sooooooo long ago, that all I remember is thinking it was pretty hefty.
I'm 9x6.5cut .... hinting at 9.5 on a REALLY good day. But I'm not only a grower, but a late bloomer. I didn't take detailed measurement accounts in HS or growing up, but I was told I was big by the woman I lost my virginity to at 16.
Oh, and I have a big nose (I think) complete with a little knot on it... some weird bump I've had for as long as I can remember.
I guess all this detailed information is just to show that there may be a little truth to size correlation. Only a little....
In short, I have big hands (I think), a big nose (I think), big feet (for sure) and a big dick (definitely).... but my body has always been on the lanky/scrawny side all my life, skinny if you will.