Set of Ruler and Needle Gauge, with embedded magnets. 1 magnetic ruler & 1 magnetic needle gauge - Ruler is 8” x 1” / 20 cm x 2.5 cm – with 3 embedded magnets - Needle Gauge is 9.875” x 1.375” / 25 cm x 3.5 cm – with 4 embedded magnets - Measures needle sizes US0-17 / 2 mm – 12 mm - Made from 100% fiber waste called polylactic acid, which is made from fermented plant starch. It is 100% biodegradable, not water soluble, and contains no plastic. - The PLA is formed around the magnets, no toxic glue was used to secure them and they won’t come out! Designed to be used with our Maker’s Board, the handy Ruler and Gauge are also useful on their own. In addition to measuring and checking knitting needle sizes, these tools can be used as straight edges on the Maker’s Board to help track patterns and charts. Note: Tools sold separately. Companion Tools: Maker's Board Kraft or Gray, Colorful Magnets (set of 6)