No you use three swatches to make the Bostons. Directions are on my site. When I say you can change the size of the template I was thinking if I make a hotpad for instance or a Tote bag and I make my hotpads 8 1/2" unfinished but you may want to make a larger quilt block with the same one I used but you would rather make a tote bag instead so make your"Blocks" with a 3" template instead of a 1 1/2" so you end up with a bigger quilt block to use in the tote.
Make sense?