How this came up in the first place: I was trying to buy the 15CDT and the seller whom I had bought from before, said he also had an older Model 4-5 he was thinking about selling at this price. The sheath said 4-5 and the knife picture was blurred. I made the deal based on a 4-5 afterwards hoping it was not a 4-4.5 in a 5 inch sheath because of price difference. Since my focus was on the 15CDT I did not ask any questions. I had no need for the Model 4, but I like the 1/4" blade weight. After making the deal I kept looking at the picture thinking the knife looks awful small. Opening the package I immediately measured the blade length, which was 5 1/8". However, it was not a 1/4" blade, but exactly 3/16". No finger pointing at anyone or regret. I love the knife, just not what I had expected. Same for the 15CDT. Life is good!