I took the plunge and bought a Quilter's Select Ruler. It doesn't slip. It has a very fine sand finish on the back side to prevent slippage. They are a bit pricey but I am finding it to be worth the money. I could only afford one so I bought the 24"x6" ruler. I just go tired of adding tapes or dots and other things to the ruler. So far in the time I have had this ruler I have had no problem at all.