AdultHat height 8” (20cm)Circumference 21” (53cm) to 23” (59cm)Materials neededUSA Worsted 4, or UK Aran, or AU 10ply45G Circular needles16” (40cm) circular USA 5 (3.75mm)16” (40cm) circular USA 6 (UK 4mm)Set of 4 double pointed USA 6 (4mm)Stitch marker to show where round starts, I used a piece of knotted thread Straight needlesUSA 5 (UK 3.75mm) and USA 6 (UK 4mm)