They're not thicker by much, and by my (possibly inaccurate) measuring, are thicker than the current KaBar made Beckers and slightly thinner than the ones from my Cam 2. The Cam 2 steel isn't the ¼" of the new KB manu'd 2's, but that Cam 2, which is pretty close to the Rowen made 12 in thickness, still fills the hand significantly more (in my homemade comparison, YMMV). I don't have real big hands and while I was afraid the 12 grips would be too big for me, they turned out to be pretty OK. Course, doesn't matter now, as I have a set of Micarta grips on there and they are the bomb.. If you have the cash, I'd suggest trading them for the Micarta.