Because I prefer big blocks, I use my 6x24" and 3x18" rulers the most. I have just gotten a June Tailor Shape Cut and have used it a lot in the last couple of days. I don't know if there is a Shape Cut larger than 12 inches, but if there is, I will probably buy one. I don't like to fold my fabrics more than once since I can't keep the inside folds straight.