Originally Posted by circa81
Then can anyone please point me in the right direction for the circumference?
Circumferential measurements of my Sigs with stock Sig factory grips:
SigPro SP2022: 5-3/4"
Sig P226ST: 5-1/2"
Sig P229ST: 5-1/2"
Ergonomics go beyond mere dimensions. You have inifinite variables of width length and radii involved. I'd suggest you pick up the pistol and determine if it's right for you.