I use my add a quarter ruler all the time for paper piecing and love it! If you place the lip against your ruler it will add the quarter, however it will not reach the fabric, which may or may not effect cutting. I would line my fabric up on the lines of my cutting mat, then line my ruler up so the 3/4" mark lines up on the second inch line, which would put the edge at the 10 1/4" place.