Perfect for keeping that ruler in place. The Ruler Betty comes with ten 1/4" wide, adhesive backed strips that you cut to your own specifications. We use pieces in several places along our rulers, but find it necessary to use more on longer rulers. They will keep your ruler from moving when cutting long strips (like 24" for example). The Ruler Betty is made up from the same product as our Steady Betty and will glide over your fabric with great ease, but when you are ready to cut your fabric just apply slight pressure to the ruler and the Betty will gently grab your fabric and help keep your ruler from moving. Get plenty for all of your rulers! The Steady Betty (TM) Superior Pressing Surface, for rulers.