Most of the info you are looking for is likely already available online:

https://www.healthline.com/health/average-hand-size#hand-size-vs-height
(The primary sources are linked in the article)

https://www.researchgate.net/publication/288518032_Kids_and_gender_Differences_i...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5535485/

https://www.sciencedirect.com/science/article/pii/S2090536X16300697

https://journals.sagepub.com/doi/10.1258/rsmmsl.49.2.123



Note that people in ancient times might have been younger on average and also likely less obese than we are nowadays. That might affect the measurements somewhat.

How to look for more information:
https://pubmed.ncbi.nlm.nih.gov
https://scholar.google.com

There are other platforms, but they are mostly locked behind paywalls. Your local university library may have access to a couple.
https://www.scopus.com
https://clarivate.com/webofsciencegroup/solutions/web-of-science/ (Web of Science)

Yes, I agree with you.
But my height is 1 m 68. For me, the lenght D is 5,3 cm and E is 2,5 cm.
If my height is 1 m 60, D would be 5,0 cm and E would be 2.4 cm.
If my height is 1 m 50, D would be 4,7 cm and E would be 2,2 cm.
Yes, some differences exist.
But ...
For example, 15 Hawaian slingstones in museum of Quimper. This is the museum I want to visit. 7 have a width of 2,4 cm. My question is : is it a coincidence ?

Look into the prolate spheriod shape, all of the projectiles in the above picture seem to follow that rule: the width is half of the length. Here is a link to an archeological video on “the sling stone of Guam and the Mariana islands”, I found this very interesting.
https://youtu.be/P-zg86E2V4w
I have my own opinions on the way these projectiles where made and why there were so many found in and around the waterway, but that is for  another day. There definitely seems to b a relationship between length and width of the projectile, which helps increases the projectiles flight stability. So far as to weight I think that was a personal preference or was based on the throwers strength? But what do I know?

And the final test is to take what u made and toss it up and down into the air spinning it like it would in flight and c if it has a stable spin or wants to wobble. This is how I came up with the right length/width for a certain weigh projectile that I wanted. And so far for me projectiles that r between 50grams and 100grams seem to work the best. If heavier I notice it is harder to keep them on the target line and the same for lighter than 50. Based upon the sizes of glandes pictured up above where the weights of them somewhere around 75-85 grams?

Blindsquirrel wrote on Jan 13^th, 2023 at 7:18am:


Between 40 and 50 grammes.

@TOMBELAINE - Do you still want hand measurements?  Sorry, I meant to post mine but forgot.  I'll definitely do it if this is still something you want to gather.

Here are my hand measurements.  The F measurement is hard to see in the picture because the line disappears between two fingers.  I measured from the first knuckle of the middle finger to the point where the finger meets the palm.  If that's not what you want, just let me know and I'll measure it again.

All measurements are in mm.

Left:
A - 78
B - 34
C - 87
D - 53
E - 26
F - 52

Right:
A - 80
B - 35
C - 89
D - 56
E - 28
F - 55