Curved Ruler Size: 2 pieces, 60 cm (24 inches) + 30 cm (12 inches), Thickness: 7 mm. Flexible - A curve that draws perfect contours without measuring, ideal for measuring curved seams and designing curved quilt border patterns. All Crafters Needed - The double-sided ruler is available in metric sizes (inches) and meters, and comes with a handy ink cartridge for easy access. Very Flexible - The ruler itself is very flexible and can be bent freely into any curve. Premium - The flexible ruler is made of soft vinyl. The dimensions are clear and won't become blurry over time.