Example: Whenever I see a (free) pattern online I really like, but I want the instructions shown as a 12" block instead of say, what it shows only in an 8", what is the best and easiest way of getting your pieces to measure out--once sewn together-- to 12" (or 12-1/2, incl. seams)?
And, yes, I am very much mathematically challenged, so a very simple suggestion or method would be welcomed from all of you out there. Thanks bunch! :-(