The 6 triangles are cut from a 5 inch strip (of the 6 layers of fabric) by 5 inches wide at a 60 degree angle. There is a lot of pinning of the 6 layers so that the pieces are exactly the same. I got 7 blocks done between 10 am - 4 pm. Mind you there was a lot of chatting, eating and ooohhhing and aaawwwing over fabric and blocks. :) Look for fabric that has a repeat from 6 (for small blocks) to 18 inches. The bigger the spread the fewer blocks you will get, but they will be dramatic. This is what the instructor said.