Diary of a Quilter Presents: Prep School Picnic Quilt Pattern by Amy Smart This listing is for the Prep School Picnic Paper Quilt Pattern. Prep School Picnic is a perfect pattern for precut 10" x 10" squares (Layer Cakes) and uses strip-piecing techniques to come together really quickly. Available in Throw, Twin, Queen, and King sizes. Features framed nine-patch blocks with sashing and posts. The finished size is 67" x 78".