I found the instructions...just incase someone is wondering...they cut the squares to 7 1/2 inches...from a 10 inch block and then use the left overs for the binding. Then you sew the 7 1/2 inch to your white block all the way around...then cut down the middle each way.
http://www.psiquilt.com/2011/06/sync...-along_23.html oh and the white squares are 10 inch squares.