I made a height stick to use for reproducing height during witness interviews. We've used it twice on the Omaha Reservation this winter.
It is simply an extending pole for paint rollers, about $15 at Menards. I marked it out from 6 1/2 feet to 11 1/2 feet but it goes to just short of 12 feet at full extension.
I marked it to the bottom of the ball, in case I want to replaced the ball with one of a different size. I actually have two pole, one with a 4 inch yellow/blue foam ball and one with the orange tennis ball.
I made this to go back and do a better job for my own report from May of 2018. Sadly, I have not been able to get in there to get it done, and now flood waters may have messed up my chances.
The third photo is an actual investigation on the Omaha Reservation in February when Robin Roberts was in town.
Witness said she saw something standing in that spot with it's head near those snow covered branches. We measured 11 feet tall. We were there to look at tracks, but they were overblown by snow.