I use the green Olfa cutting mats. I have I think one of every rotary cutter on the market and I tend to grab whichever is closest. I prefer the Olfa Frosted ruler 6" X 24". I don't care for the Omni Grid rulers as I think they are too busy ie: to many lines on them.
http://www.joann.com/olfa-frosted-ru...-x24-/prd9818/ I'm sure I bought mine at either Joann's or Hancock Fabrics with a 50% off coupon.