While I was visiting the Wilfred Works on Thursday, a character named Boogie showed up and layed a knife down that was in need of attention. Tony said this knife has cleaned more critters in a day than most knives see in a lifetime, and has done that for at least 20 years. I have to estimate, because I didn't measure it, this is about 5 1/2" closed. The blade and spring next to it is a bit bigger but the blade profile is the same as this knife was originally. It has seen alot of use and Tony says he had to replace the original nickel silver pivot pin with a stainless one a number of years ago. I has nickel silver bolsters which is a tell tale sign that this is a classic Bose knife, as Tony uses stainless steel mostly these days.