Many Leatherman tools include a ruler, with markings for centimeters and inches stamped into the stainless steel body.
If you do occasion handyman work, it is amazing how often you'll need to make some simple measurement when you don't have a tape measure handy, but do have a Leatherman tool nearby. On the larger tools the ruler covers both handles, so you can fold them flat and measure a length up to 200mm (8"), or even a bit longer on the jumbo-sized tools.