I have grown fond of knives in the 3 and a half range, its the size of my trapper. with the exception of the peanut, I try to go for 3 inches as the smallest, otherwise there is less comfort from the stubby handle. might go for a 3 5/8ths as biggest but anything biggers just looks to big for me and it just becomes cumbersome in the pockets ( also look silly in my abnormally small hands!) of course, I would carry a case slimeline trapper even though it is 4 1/8 but because its so slim, its easy in the hands and not to much bulk in the pockets. we may have to take how wide the knife is also cause small may be good but get to chunky and it feels like a rock. have this workhorse whittler that is a beaut, great blades on it, but cause of how wide it is, im reluctant to use it for daily carry.