Well, here we go, but this is a favorite topic with both me and a friend. What is the optimal size and shape for a EDC pocket knife? Both friend and I have positions/professions that effectively prohibit me from being seen with a threatening knife. It also cannot be so large as to cause a massive or heavy lump in my pocket, be intimidating when seen doing things like opening packages (with co-workers or students about). I think ideally, it should be useful for making lunch when necessary...or reworking the food I buy out. No Swiss army knives, thank you. Ditto any knife that does not have a locking blade or is too flimsy for light weight prying and tinkering. At the present moment I am inclined toward a blade somewhat wide, about 3" in length, ideally with a high-tech plastic handle to limit weight. Ready, set, go! Oh, hey...what about something folding or otherwise for backpacking. I have only 45 years experience in the woods, or a bit more, but have never been able to find the right combination of light weight and functionality. Lately I have been using the blaze orange handled version of the Swedish army knife. Light, tough but the flimsy sheath needs replacing.