the siggy block swap we did we made 3 1/2" siggy block; take a 3 1/2" white square, place a scrappy 2" square on 2 opposite corners, stitch on the diagnol trim corners and press, write on the white centers. i think there are a couple pictures recently of quilts layed out from the swap. easy to do, i think it took me about 45 minutes to make over 100 blocks Not counting cutting time; i took longer to write on them but you have lots of people to do that part :)