Below is the link to Suzanne's book on Amazon - I think its $12.95 plus shipping.
http://www.amazon.com/Five-Minute-Qu.../dp/1574214209
According to her blog, the 3 pieces for the large blocks are 5 1/4 x 10" and the 3 pieces for the small blocks are 2 7/8 x 5 1/4". BTW - i know everyone hates to cut 7/8 increments but in this case try as much as possible to do so - if you don't you will end up with an overhang on the raw edge when you fold the triangle down.