Anyone who likes to knit often has a large variety of knitting needles in various sizes and gauges. And how often do you find scattered knitting needles when cleaning and sorting wool? This is where Prym's knitting needle gauge is a practical aid in determining the knitting needles thickness. This useful card made of robust, white plastic has 19 holes with the usual diameters of all common knitting needles ranging from 2 mm to 10 mm. This allows for every knitting needle gauge to be accurately determined using this practical knitting accessory from Prym.