Hat Sizing Calculator
Calculate the number of stitches to cast on for a perfectly fitting hat.
Size Selection
Your Gauge
Standard Hat Sizes
| Size | Circumference | Height |
|---|---|---|
| Preemie | 12" | 4.5" |
| Newborn | 14" | 5" |
| Baby (3-6 mo) | 16" | 5.5" |
| Baby (6-12 mo) | 17" | 6" |
| Toddler (1-3 yr) | 18" | 6.5" |
| Child (3-10 yr) | 20" | 7" |
| Adult Small | 21" | 8" |
| Adult Medium | 22" | 8.5" |
| Adult Large | 23" | 9" |
| Adult XL | 24" | 9.5" |
Hat Knitting Tips
- • Hats should have about 1-2" negative ease
- • Making stitches divisible by 8 simplifies crown decreases
- • Add a ribbed brim (1-2") for a snug fit
- • For slouchy hats, add 2-3" to the body length
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