Oh, I LOVE THESE! They will be so pretty! I used 4.5" inside blocks; they finished up 8" with seam allowances and 7.5" finished. I cut out and pieced another one last week using GA Bulldawg fabric, and the center square was probably 3". Made the squares much smaller (my husband is still asleep or I'd go measure the squares, but I'm letting him sleep!), but this pattern was so easy, they worked up quickly.
PLEASE post a picture of yours (and let me know you did) when you get some of your squares together. I am always looking for new patterns to try, especially for baby quilts! Yours is going to be so pretty!