I made this Sawtooth Star Block, and as beautiful as it is it falls short of the 12 1/2" in the directions. GRRR! This is the link I used to make the block. I really wanted it to be 12 1/2"!!! (My Bernina Activa does an accurate 1/4" seam allowance)
http://delawarequilts.com/BOMs/Sawtooth/index.html