Mine is not 1/4", it looks like the same thickness as the Black one but I dont have a way to measure it precisely. Someone on a different forum had the exact measurements and it was less than a 1/4". I was looking forward to a 1/4 'er myself. I didnt really "need" a Tan version of the 311. My black 311 is a terrific knife. I dont think the Tan one will see any carry time. One more in the safe for future generations I guess. I Hope this helps.

Unklfranco