Hat Size Guide

Hat Size Guide

Everyone is unique, however these charts were designed to give you a rough idea of average circumference for project planning purposes. These yardages are rough estimates, as yarn usage changes depending on stitch pattern. You’ll need approximately 2 inches of negative ease for your hat’s circumference; that means the circumference of the actual hat should be approximately 2 inches smaller than the circumference of your head.

These yardages were estimated using a gauge of 5 sts per inch and a stockinette stitch. The heights and yardages were calculated taking into account a folded brim or a slouchy style hat; fitted hats will be shorter and may require less yardage.

Hat Size Chart
Age Head Circumference Hat Height Yardage
Preemie (1-2 lbs) 9″ 3.5″ 50-110
Preemie (3-4 lbs) 11″ 4″ 50-110
Preemie (4-5 lbs) 12″ 4.5″ 50-110
Preemie (5.5-6 lbs) 13″ 5″ 50-110
Newborn 14″ 6″ 100-150
Baby – 3 to 6 months 17″ 7″ 100-150
Baby 6 to 12 months 18″ 7.5″ 100-150
Toddler – preschooler (12 months – 3 years) 19″ 8″ 100-150
Child (3 – 10 years) 20″ 8.5″ 100-180
Pre-teens and Teens 21″ 10″ 100-180
Adult Woman 22.5″ 11″ 120-200
Adult Man 24″ 11.5″ 170-250
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