Check out Pam Bono's site. She has some 18" blocks that will blow you away. Her patterns are easy to follow, prices are very competitive and if you join her club then many of the blocks are free. I've been a member of Pam's Club for four years and have never had a bad experience yet. Also Deb Tucker, 180 Degree is in the title of the site, has some beautiful patterns with large blocks. She is, of course, selling her rulers which are totally amazing; but she also is a major talent.