I recently bought a Go cutter and have been thinking how to use it and build my die library efficiently. Mine came with a "value" die that has a (finished) 4" square, 2" square and half square triangles that finish at 2". It occurred to me that to get other dies that would coordinate with those sizes would be a good idea. So I bought the half-square triangles that finish at 4" and also the quarter square die(4") which would allow many patterns, like Ohio star and pinwheel, etc. right now, I'm on a "die diet", till I use them. Will ask for some other sizes for my birthday and Christmas. Hubby is happy to have ideas for those occasions. JMHO . Have fun, whatever you decide! I love mine!