So many beautiful quilt fabric collections and not enough time to quilt them all? Now I can use those fat quarter collections every day with napkins that reflect my love of fabric. I am joy-filled seeing and using these every day and I think you will be too. There is no calculation to do to make these miters. Just cut and sew the pattern. BASIC SKILLS NECESSARY Experience cutting with a rotary blade is useful SIZING / FINISHED MEASUREMENTS napkins are 15.25" square placemats are 19" x 14"