These work great!
It's perfect to help hold the lids of the tumblers when I am decorating them, I can use both hands to do what I need to do.
I absolutely loveeeee it!! It has made making blanks so much easier!!
The XL Vert-Align Ruler - Get Straight Lines on a Curved Surface
Vert-Align Ruler Bundle - Includes the 8" and the 10.5"