The perfect size for working with fat quarters - and it's cute!! 3.5 by 18 inch iridescent quilting ruler. Markings are every 1/8 inch, with a diagonal line at 45 degrees on either end for easy half square triangle trimming. This is a great size for cutting down fat quarters! Laser cut and engraved from 1/8 inch acrylic. The markings are engraved so they'll never rub off. Non-slip dots provided with every ruler.