Can anyone explain why razors are only sized in 8ths and 16ths of an inch. Anything else would be sized to the lowest common denominator, for example, a 4/8 is 1/2, a 6/8 is 3/4 and 8/8 is 1/1 or 1 inch.
I can understand the 16ths as they are between the 8ths, I included them so I didn't get posts saying that 16ths were used, so my question is why are 8ths of an inch the lowest denominator used?