Needle Gauge includes needle holes for sizes US sizes 000 to 35 (1.5 mm to 19 mm) and crochet hooks B to S. A total of 24 different sizes. There is no t another gauge on the market that has this many needle sizes. Made from high impact plastic resin which will not easily break(.060" thick). Colour of gauge is white with dark blue text, measures 3 5/16" x 5-25". Gauge can be easily attached to the Knit-Kard sets which allows you to keep all of your tools in one place. Made in USA.