What would be wrong with a tournament "Golden Rule"? I do suggest whatever you use... don't place it in the direct sun. It will cook your fishies when laid on a hot board. I used a ribbon type sewing measuring tape for a long time. Just taped it to the bottom of a $2 basket from the dollar store. Also I could put basket and all on the scale and weigh and measure at the same time.

Dear Alcohol, We had a deal where you would make me funnier, smarter, and a better dancer... I saw the video... We need to talk.