So many different shapes - the upright ones tend to look the longest, but often the ones that sweep back measure longer (if you are hung up on numbers) The one thing that RW and SCI scoring fail to recognize is mass in the horn above the base.
I will throw in a picture of a bull that just squeaks RW - but I've yet to see one that I'd trade him for - the mass in the upper part of the horn is phenomenal - length right at 23 with bases just under 14 and mass right out to the tips