joanns usually has them too, use a coupon. I like using them for 1/2 square triangle blocks. If you like making them big and cutting them down, or making them 4 at a time style, whatever method you like, you can still use that method. With that ruler (there are other brands too) you cut strips, place them right sides together and use the ruler, no waste. Be sure the line is On the fabric, not off.