The Essential Knitting Tool: Knitting Needles Knitting needles are long, slender tools used to interlock yarn or thread into fabrics and garments. The most common materials are aluminum, wood, bamboo, and plastic. Sizes range from very thick 8mm needles to thin 3.25mm needles. Points can be sharp or blunt. Quality needles glide smoothly without splitting yarns. Visit:https://www.knitterspride.com/knitting-needles/en