Omnigrip Non-Slip Quilter"s Ruler For Special Cuts. Perfect for use with straight-edged blades and rotary cutters. This ruler is ideal for 5 inch Charm Squares and Dessert Rolls, 2-1/2 inch Jelly Rolls and squares, 1-1/2 inch Honey Buns, 4 inch and 4-1/2 inch squares, 10 Layer Cakes and bindings. Ruler measures 5 by 25 inches and is constructed of crystal clear acrylic with bright green and black markings. Made in USA.