Hat Size Charts

  • You’ll need approximately 2 inches of negative ease for your hat’s circumference.
  • Obviously, not everyone is average, these charts were just designed to give you a rough idea for project planning purposes.
  • These yardages are rough estimates, yarn usage changes depending on stitch pattern.
  • These yardages were estimated using a gauge of 5sts/inch and a stockinette stitch.
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  22.5″-24″ 11.5″ 200-255