There is no single best blade length for bushcraft. This guide explains how to set a length range from your actual tasks, how to read stated blade length on a listing, and where a 20 cm catalog example sits.
Why no single number is the answer
Bushcraft is a bundle of different cutting jobs: carving, cutting cord, preparing kindling, food work and general camp utility. Those jobs pull in different directions on blade length, and they also interact with blade thickness and overall mass. A short blade is easier to control for detail work; a longer one gives more reach for some tasks but adds size and weight to carry. Which trade-off suits you depends on what you actually do most often, so any single figure presented as the universal best length should be treated with caution.
What a listing can do is give you a stated blade length to compare against your own routine. It cannot tell you how a blade carves, how an edge holds up, or how the knife feels after an hour of use. No independent test results are supplied here to fill that gap.
Set a range from your tasks, then check it against stated figures
A practical method is to work from the tasks you expect rather than from a target number. If most of your cutting is light — cord, food, small shavings — a shorter blade may cover it. If you expect to work thicker wood or want more reach for general camp chores, compare longer listings while accepting the added carry size. Write down the tasks first, then look for stated blade lengths that plausibly cover them.
Then read the listing carefully. Blade length is one stated dimension among several, and listings do not always say where the measurement starts and stops — from the handle junction to the tip, or from the sharpened edge only. If a specific figure decides your choice, ask the seller which points the measurement runs between. A reply that names the points resolves the question; a reply that only restates the number does not.
Use ordinary conversion to compare listings that mix units: 20 cm equals 200 mm, and 5 mm equals 0.5 cm. That changes how a figure is written, not what it measures.
Where one catalog example sits
The M10 Integrated Keel Fixed Blade Knife is a fixed-blade example listed with a 20 cm blade length, a 32.8 cm total length, a 5 mm blade thickness, a 12.8 cm stem length and a net weight of about 400 g. Its stated blade material is 1095 high carbon steel, its handle material is nylon, and the attachment is a K-sheath. Those are the listing's stated figures, not measurements that have been checked.
Read that as one data point for scale, not as a tested winner or a recommendation over other lengths. A 20 cm blade is long relative to many compact bushcraft knives, and the stated 400 g weight is a real mass to carry; whether that suits your pack and tasks is your call. The listing gives no hardness figure and no care or sharpening guidance, and it does not say whether the blade or any part of the knife is user-replaceable or serviceable. Where those facts are missing, they are missing — do not infer them from the steel name or the fixed-blade format.
A useful next step is to mark your candidate length on a ruler and hold it against the tasks you listed. That gives you a physical sense of scale without pretending a listing can predict how the knife will perform.
Is 20 cm a good bushcraft blade length?
It can be, for users who want more reach and accept the added size and mass. The M10 Integrated Keel Fixed Blade Knife is listed with a 20 cm blade and a net weight of about 400 g. Whether that length suits you depends on your tasks and carry preferences; the listing does not establish how the knife performs.
Should a bushcraft knife have a longer blade than a pocket knife?
Bushcraft work often involves thicker material and more reach than everyday pocket-knife tasks, which is why longer blades are commonly compared for it. That is a general observation about task demands, not a rule, and the right length still depends on what you actually cut.
