Alvanon is a company that makes and sells dress forms (aka "dressmaker's dummies") for the fashion and apparel industries. They also do extensive research on the dimensions of actual human beings, both adults and children, all around the world. They do sell 3D model services, but they are very expensive and geared exclusively toward their target industries. In other words, you can't buy one of their standard male or female models to use as a posing dummy in Clip Studio Paint or as a base in your 3D modeling software.
But they do have a massive amount of data on human dimensions you can use as a starting point. On their website there are PDF product data sheets for each of their many dress forms:
https://alvanon.com/resources/alvaform-manual/
If you go to the last page of each of those product data sheets you'll find all the dimensions for the dress forms in both inches and centimeters in a chart like this:
You can glean the dimensions you need from there. In this sample it is for six men's UK clothing sizes, but what are useful are measurements such as the Total Height, Inseam, Across Shoulder, etc.
Of course it's helpful to know how they arrive at those measurements so you'll also want to check out the Measurement Specifications documents:
Which have useful charts like this inside:
Universities are also doing this kind of work for other industries. For example, here is a 2018 survey published by the University of Malaysia Engineering Department which gathered anthropometric data on Malaysian, Thai, Filipino, and Indonesian men and women:
https://www.ias.ac.in/article/fulltext/sadh/043/01/0010 (PDF file)
I took a bunch of data from various sources (including the CDC, EU, the Malaysian survey mentioned above, an architectural design website, etc.) and put it all in a spreadsheet to get these "Average Human" dimensions:
AVERAGE HUMAN DIMENSIONS
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MALE FEMALE AVERAGE
HEIGHT 1715mm 1588mm 1651mm
EYE HEIGHT 1599mm 1478mm 1538mm
SHOULDER HEIGHT 1411mm 1302mm 1357mm
SHOULDER BREADTH 418mm 382mm 400mm
ELBOW HEIGHT 1072mm 991mm 1032mm
HAND LENGTH 189mm 174mm 181mm
HAND BREADTH 77mm 76mm 76mm
REACH UPWARDS 1724mm 1540mm 1632mm
LOW HIP WIDTH 376mm 382mm 379mm
WEIGHT 77kg 62.5kg 69.7kg
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The data sets were based on the geographic location of wherever the particular study was being done, with no break-down by race or ethnicity, just male and female. So it's probably not as globally encompassing as it could be.
In addition to the apparel and fashion industries, knowing these numbers could be useful to engineers, architects, furniture designers, industrial designers, and probably video game, 3D animation, and other artists who work with or from 3D character models.
