Carpenter. Still think of planks in inches.Because they are from inches but then they are planed so a 2 by 3 are no longer 50x75 but 45x70
It helos when thinking about the larger ones. is it 220 or 225 ? 225/25 is 9 so it has to be 220.
I think it was easier to remember 2 by 9 than 45x220 It was less numbers, made it more simple.