how pretty!! do you have a fabric to add to them? it would be lovely to have a large center of your features.. then strips around.. like a 9-patch. but the center is very big and the strips are small to show off the fabric.
cut sizes
center 6.5" x 6.5"
sides 2.5" x 6.5"
and 4 corner stone 2.5" x 2.5"
You can repeat the center for the 4 corners and then use a more tone on tone for the sides in several shades... set side by side