I found a coupon online but had a hard time using it on anything I wanted since everything in the store was on sale. I ended up buying an Omni Edge ruler. (I've never met a ruler I didn't like.) It has a removable lip on it to keep the ruler from slipping off the edge of the cutting mat. It was quite pricey I thought. It was originally 39.99 and I got it for 16.00. It's really hard for me to use these coupons as they always seem to have all the quilting-related items on sales too.