My current paper piecing project is sized for A4 paper. There isn't much of a size difference from regular paper. I can't get this project to print correctly on standard paper. To order A4 paper piecing paper isn't too bad, the shipping(international) is more than the paper. I buy the cheap pads of drawing paper pads at the dollar store and trim them to size. I use it for all of my projects as I like it better than regular paper piecing paper.