I used a layer cake for a quilt. Here is the result. I had four blocks left over that made a matching cushion. The quilt is going back and forth between the home and hospital with the mother of one of my special needs students. Mum has cancer and says that the quilt cheers up her, her family, the nurses, and the doctors.
The quilt is held up by my 6''1' son, so you get an idea of size.