Sizing is just the start! A well-fitting hat depends on yarn, stitch choices, and shaping techniques. Learn how to adjust for the perfect fit and explore creative hat-knitting tips in our Hat Knitting Classroom.

	X-Small Preemie (1-2 lbs)	Small Preemie (3-4 lbs)	Medium Preemie (4-5 lbs)	Preemie (5-6 lbs)	Newborn	Baby (3-6 months)	Baby (6-12 months)	Preschool (1 - 3 years)	Chld (3-10 years)	Pre-teen and teens	Adult Woman	Adult Man
Circumference	9.00 22.86	11.00 27.94	12.00 30.48	13.00 33.02	14.00 35.56	17.00 43.18	18.00 45.72	19.00 48.26	20.00 50.80	21.00 53.34	22.50 57.15	24.00 60.96	Circumference
Depth	3.50 8.89	4.00 10.16	4.50 11.43	5.00 12.70	6.00 15.24	7.00 17.78	7.50 19.05	8.00 20.32	8.50 21.59	10.00 25.40	11.00 27.94	11.50 29.21	Depth
NumberOfPoints	4.00 10.16	4.00 10.16	4.00 10.16	4.00 10.16	6.00 15.24	6.00 15.24	6.00 15.24	6.00 15.24	6.00 15.24	6.00 15.24	6.00 15.24	6.00 15.24	NumberOfPoints
Ribbing Height	1.00 2.54	1.00 2.54	1.00 2.54	1.00 2.54	1.00 2.54	1.50 3.81	1.50 3.81	2.00 5.08	2.00 5.08	2.00 5.08	3.00 7.62	3.00 7.62	Ribbing Height
Tamm Points	4.00 10.16	4.00 10.16	4.00 10.16	4.00 10.16	4.00 10.16	4.00 10.16	4.00 10.16	4.00 10.16	6.00 15.24	6.00 15.24	6.00 15.24	6.00 15.24	Tamm Points