- 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 |