Needle Gauge by Cocoknits

Fashioned based on what a jeweler would use to size diamonds, the result is a joyous rainbow stack of connected discs for identifying knitting needle sizes US 0-15 / 2-10 mm. 

And because Cocoknits is committed to avoiding plastic wherever possible, it is manufactured it from PLA, a 100% biodegradable, plant-based plastic substitute!

The discs swivel out and click back together with tiny magnets (which makes it as much fun to play with as use) and the whole rainbow tool is small enough to pop into your knitting bag, so you'll never leave home without it.