An easy way to measure your fish is to measure your reelseat and grip. Most grips I believe are now about 7 1/2" ( count the cork rings there 1/2" each) plus a 3 1/2" reelseat, a one inch signature wrap you've already got 12". On many of my rods I also add an intermediate wrap at the 18" and 24" inch mark on the rod blanks. Now just lay the rod next to the fish instant measurement. Less fish handling heck you don't even have to touch them.

Tom