It's an online pattern I've used before - but last time I used a layer cake and jelly roll so did not cut it as written in the pattern. Cut each 10" square in half so had 5 inch centers instead of 4.5". Then sewed the 2.5" strips on each side and squared to 9" I think.
Pattern:
http://kickassquiltsupplies.com/Share/taketwo.htm