As a Norwegian I think metric and punds, paces, feet, inches and whatnot are not everyday units of measurement to me so I just started thinking.
Paces are used as a unit of length in the rules, and I just sort of always considered it to be approximately a meter, but lately I've been reading some roman history an I thought to my self that it could be roman paces, or passus, the rules mean.
So I google a bit and discover that a passus is 1.48 meter and an american pace is 0.76 meters.
The pace is nominally an actual caster's pace, but the rules often treat it as a yard, 3 feet. The Roman pace was a double step, which is to say about 5 feet. A single step is about 2.5 feet, roughly 76 cm or 30 inches.