If you are talking about stud spacing, you are limiting yourself geographically and even more restricting yourself to a specific small method or construction.
For wood and similar compatible materials the major basic module is 4' for some strange reason. After that it is cut into 1/2, 1/3, 1/4, etc. increments getting down to 1/24 if you are myopic. - the rest of the world uses a different "ruler" that happens to be definitive and convertible as the scale changes.
For the U.S. standards, 24", 16", 12" and 8" are common. For the rest of the world, a meter is divided into easy conversions by dividing by 2, 4, 6, 8 or 10 and so on.
There are always areas like civil/surveying/layouts where everything is metric to begin with, but switches to foot/inch when setting grade stakes. Down one means down 1/8 inch or down .01 foot. Same for "give or take one" when plumbing/laying out since once you get to the point of splitting hairs, there is little real difference.
A stud is just a generic term for a local building material and the is always some forgiveness or tolerances. A steel stud in the U.S. is not the same as a metric steel stud if you really look at standards.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.