Creative Grids Non-Slip Rulers- Quilting Ruler - 3" x 18" Creative Grids square and rectangle rulers are unique in their markings. Turn one way and use the 1/2" strip to cut 1/2" measurements. Turn a Round to cut whole inches or fractions like 1/8" or 1/4". Gipper Dots: These are the secret to cutting fabric with ease and accuracy - opaque dots that run along the edges of the rulers are part of a patented design that works to prevent slipping and sliding as you're cutting.