How to Work Out Which Knife You Actually Need

Most people buy the knife they imagine using and then it sits in a drawer. I have made knives for people for years. The single common thing I hear afterward is that they wish they had gone smaller. Not sharper. Not tougher. Smaller. The knife they pictured themselves using turned out to be different from the one they actually reach for. So this is the set of questions I ask before I build anything for somebody. Work through them in order. The answer is usually obvious, by the one.

This is the choice and everything else comes from it.

Choose a fixed blade if the knife will be used hard used in water or used outdoors for days. A pivot is a hinge and a hinge full of dirt after three days in the woods stops being a thing. Batoning is also how folding knives break so if that is on your list the decision is already clear.

Choose a folder if the knife needs to go into a pocket and come out at a desk in a car in a kitchen or in a line at a store. A fixed blade on your belt, in town gets you a conversation you did not want.

The truth is this. Most people who say they want a big fixed blade actually spend their week doing folder tasks.

Blade length is the thing that most people get wrong. Blade length is also the easiest thing to get right.

Three inches is the length for pocket carry. I think three inches clears a pocket opens without needing swinging room and stays legal in US cities. Check your city rules rather than the state ones because city rules often differ.

Three and a half to four and a half inches is the length for hunting. Four inches covers all North American big game. Longer blades look impressive. Then get in the way inside a rib cage.

Four to six inches is the length for camp and bushcraft and a knife with eight to eleven inches works well. Under eight inches you lose the leverage to split wood. Thirteen inches the knife stops being useful, for the small jobs, which are most of the jobs.

Every knife steel has to trade off three things. How long it keeps an edge how easy it is to sharpen on a stone and how well it stands up to water without getting rusty. You can't have all three things at once.

If you are going to wash the knife dry it. Put it away choose a stainless steel like 440C and stop thinking about it. If you cut a lot and sharpen rarely choose a tool steel, like D2 and be ready to spend more time on a stone. If you like taking care of your tools choose carbon. It makes the edge and comes back the fastest and it shows when you leave it damp. The word ambitions matters here. Buy for the person you're not the person you plan to become.

Two things decide how long a knife lasts and neither of them photograph well. Full tang means steel runs across the length of the handle with scales on both sides. If a listing does not mention tang anywhere that silence usually means the knife does not have full tang because people advertise full tang when they have it. Heat treat is the one that nobody lists. The same steel can be excellent or mediocre depending on what happened in the oven and the quench. Ask for the number. High fifties is where a working blade belongs. Harder, than that the knife chips when it meets bone; softer, the edge rolls. A shop that can answer without hesitating is a shop paying attention.

I often see that handles photograph well. Feel wrong more often than hand would expect. I check that shape fills hand with no corners landing at base of fingers and that grip still works when hand is cold or wet. A handle that only feels right in an indoor grip is not a handle for a field knife. I find that Micarta and G10 grip well when wet and shrug off knocks. Stag and bone are naturally textured and age with use. Wood is warm in hand. Needs a bit more care. If hand cannot hold one I suggest looking at photos of somebody holding it so hand can judge proportions, against a real hand.

If you follow those five steps in order you usually finish with a simpler knife than the knife you originally wanted. In my experience that is the knife that gets carried.

If you want an explanation about how a forged knife differs from a knife cut, from sheet steel this page covers the process side: guides