Is this the block?
http://starwoodquilter.blogspot.com/...block-one.html If it is, it is a 5x5 layout, so it would come out nicely as any multiple of 5. That would mean a 10" block if each section is 2". Or a 7.5" block if each section is 1.5". You get the idea. You can really make it any size you want, but it's easier if each section is a size that's easy to measure. (Unless you want to use templates.)