The Cocoknits Needle Gauge is a fun way to add some color to your notions bag and keep a compact tool with you at all times. With sizes from US 0 (2.00mm) to US 15 (10.00mm), you can easily check the size of your needles for projects from socks to chunky scarves and everything in between. Needle gauge is created from 100% biodegradable PLA (polylactic acid) that is a plant-based plastic substitute. The rainbow-ordered discs click together with tiny magnets and the gauge measures approximately 1" by 1½" when closed. Please Note: While the color order is fixed, each needle gauge has a random starting color and may vary from those shown.