I use a thick mop handle cut down to 26". Started by sanding a 1/4 inch flat section along it's length. I marked it every inch by transfering marks with a yard stick. I also wrote the name of the fish for it's size limit at the appropriate size. I sealed it with clear acrylic and tada. It floats, It measures and it also can be used for knocking a fish in it's nogin.

Dave