Originally Posted by nativetexan
I've had to use my long 24 inch ruler beside another one to cut things before. just be sure you measure correctly when counting the other ruler. don't use one that has 1/2 inch on the outside, that is.
also one way is to take what you need to cut and fold in half and press, then measure out 1/2 of the size you need and trim.
This is how I would do it, folding it in half.