I have been wondering about this for a while now. 1" was picked in the beginning because the 6" stones only came in 1/2" or 1" widths, and 1/2" is too narrow. I think 6" long is correct. Maybe 7" would be nice for the stroke length but it would increase the size of the sharpener itself, which I am against. As for the width, I find I only use about 60% to 75% of my 1" stones so I think it should be narrower. I cut down some polish tape holder blanks to .6" and .725" wide, and think the .725" wide stone would be my pick. Of course, the stone holder widths would need to be the same too, I wouldn't want them wider than my stones. The advantage of a narrower stone is that you would get a thicker abrasive for the same money. Making a narrower stone with the same abrasive thickness wouldn't save much, so going with thicker abrasive would be the better value.
So, if we were starting from scratch, what size stone would you pick for guided sharpening?
So, if we were starting from scratch, what size stone would you pick for guided sharpening?