The Prym Knitting Ring Set is ideal for easy knitting scarves and hats. Set includes four sturdy plastic rings in pink, orange, green and blue colors with sizes 13.5cm, 18cm, 23cm and 28cm in diameter; a wool needle and knitting hook to lift and pick up the wool; as well as detailed instructions on how to knit a hat and scarf. Each plastic ring has notches on the outside that make it easy to pick them up with the hook. In addition, it is recommended to use wires with a thickness of 5 mm to 10 mm to obtain the ideal mesh thickness.