Chris, I have to be honest with you. I have run many tests and measurements and found that for my anatomical characteristics and honing style, the absolute perfect dream size coticule for me would be 299mm x 67.5mm x 35mm, 4lbs 10oz. If you happen across one, do let me know

Seriously though I like 8 x 2 for hand honing. I haven't found a size I like for bench honing. Maybe I just don't like bench honing