This is a set of 12 diffferent sized knitting needles:3.0mm3.5mm4.0mm4.5mm5.0mm5.5mm6.0mm6.5mm7.0mm8.0mm9.0mm10.0mmBenefits:Comfortable to useLightweight - you will be able to crochet for hours with these!Bamboo needles improve with age, and grow warmer and smoother to the touch the more they are used