ok I looked up the link and it appears that this pattern can be translate very easy. here's the link that I found
http://www.e-patternscentral.com/det...l?prod_id=6870
It looks to me like each block is done with 4 four patch blocks so to make them 12" square you need to make the 4 patches squares unfinished size of 6 1/2" square so each little square should be cut as 3 1/2".
Hope this makes sense and helps.