Oh, I just saw the rest of your post :) The rectangles are 3" x 5.5"
I am very excited to try hand quilting and work on this "collaborative project" with my great-grandmother.
I think if I need to do quilting inside the blocks, either a four-leaf clover (she was a renowned clover-finder. She could walk down a street and have a handful in minutes) or a honeybee (she made her own honey) or possibly her initials or a combination of all three.