Jul -
There is a Turning Twenty pattern called "Superman" that makes a 16" block and the pieces are fairly large. We used it here:
http://www.quiltingboard.com/t-85346-2.htm
Look at page 2 to get an idea of size - Ralph is 6'4". We will definitely use this pattern again if we want to showcase a large print.
The book is #5 - Simply Sashed.
Darren