It's not hard to find more information about body proportions. I found this interesting pic on a site called craftworks where it was posted to help doll-makers.
As far as using the information in sewing, I am considering the truism that when you put on weight, it will settle in your shortest quadrant. We may, perhaps, seek to select silhouettes to counter that effect!
But it is more fun and positive to focus on where the opportunities are. The longest quadrant becomes the canvas for sewing & styling efforts.
On me, my "canvas" is in the upper chest, so necklines and necklaces will be fun to play with.
I intend to use this information to focus my sewing, and how I work the jewelry.
Focus is a good thing! It helps me drop the ideas on sewing jeans or embellished skirts. I am better off to keep bottoms quiet and simple. I'll be adding details and embellishment on the canvas! I guess that makes my legs just the easel stand, eh?