DIY Lace Paper Envelope: To make, lay a 9-inch square doily face down, with a corner pointing toward you. Center invitation on top. Fold up bottom point, then side points, and finally the top. Insert into envelope. 9-inch square butterfly doily (p78810), $5.50 for 20, Artifacts, Inc., email@example.com. Paper, P.S. Collection cover weight, $3.75 for ten sheets, and A7 envelope, $4.25 for ten, Paper Source.