Asked my new good friend chatgpt to calculate volume disparities between arms

[karasan]

Using the same formula as before and assuming a constant arm length of 12 inches, we can estimate the arm volume for different upper arm circumference sizes as follows:
Arm Volume (in cubic inches) = (Pi / 4) x (Arm Circumference in Inches)^2 x Arm Length in Inches

16-inch arm: approximately 433 cubic inches
17-inch arm: approximately 490 cubic inches
18-inch arm: approximately 554 cubic inches
19-inch arm: approximately 625 cubic inches
20-inch arm: approximately 703 cubic inches
21-inch arm: approximately 789 cubic inches
22-inch arm: approximately 882 cubic inches
As you can see, each additional inch of upper arm circumference leads to a progressively larger increase in arm volume, with the largest difference between adjacent sizes occurring between the smaller sizes (e.g. the difference between 16-inch and 17-inch arms is larger than the difference between 21-inch and 22-inch arms).

Ofcourse generally plus 20 inch arms are on taller individuals, which brings their volume to even higher levels.

[karasan]

Using the same formula as before, but for chest volume, and assuming a constant depth of 9 inches and length of 24 inches, we can estimate the chest volume for different chest circumference sizes as follows:

45-inch chest: approximately 7,997 cubic inches
50-inch chest: approximately 11,780 cubic inches
55-inch chest: approximately 16,079 cubic inches
58-inch chest: approximately 18,309 cubic inches
As you can see, each additional inch of chest circumference leads to a progressively larger increase in chest volume, with the largest difference between adjacent sizes occurring between the larger sizes (e.g. the difference between 55-inch and 58-inch chests is larger than the difference between 45-inch and 50-inch chests).

[wazhazbin]

wasn't there a guy named Luke on here that did these calculations around 2010?

but i agree, a 22 inch arm is a lot more than 10 percent larger than a 20 inch arm.

just like a 14 inch pizza is twice as large as a 10 inch pizza.