The large star blocks are 15", the bordered center block is 21", the smaller star blocks are 12". I might try to go smaller. The alternate 6" blocks are economy blocks from Blended Traditions by Marsha McCloskey. The feathered star class I took last week with Marsha has been quite an inspiration to push myself. I think I will make some small easy star blocks to border the 12" stars if I decide on this layout. I am playing with 2 large scale prints for the center border. I have fussy cut the center squares of the 6" blocks using the large and medium scale prints. From a distance they almost look like framed photographs.