Size Quoting Convetion

What dimension is generally referred to when people are quoting the size of their machines?

If I am planning to build an MPCNC with 2’ long frame rails, am I building a 24"x24" or 13.5" x 13.5" machine?

Can’t we agree that size doesn’t matter, as long as it’s rigid and plunges the way you want it to?




I always say something like 2’x2’ OD or footprint, 2" usable Z, etc.