I just finished several sets of placemats and sandwiched all of them with two layers of polyester batting. I made all of them 13 X 19 which seems to work out well with basic table settings. I used cotton/polyester blends for the tops and backs. And I "deisgned" the tops by modifying several popular quilt patters, flying geese, log cabin, etc. The only limitation was to make the designs fit into my chosen size.