Crochet & Baby Hat Size Chart
Crochet and knit hats stretch more than fitted caps. Use this chart from newborn through large adult—also a practical baby hat size chart by head circumference.
How to measure hat size · Hat size converter · All hat charts
| US Alpha | US Fitted | UK Fitted | EU | Head (in) | Head (cm) |
|---|---|---|---|---|---|
| Newborn | N/A | N/A | 35 | 14" | 35.5 |
| 3-6 Months | N/A | N/A | 40 | 16" | 40.5 |
| 6-12 Months | N/A | N/A | 43 | 17" | 43 |
| Toddler | N/A | N/A | 45 | 18" | 45.5 |
| Child | N/A | N/A | 48 | 19" | 48 |
| Teen/Small Adult | N/A | N/A | 53 | 21" | 53.5 |
| Medium Adult | N/A | N/A | 57 | 22.5" | 57 |
| Large Adult | N/A | N/A | 61 | 24" | 61 |
How to use this crochet hat sizes chart
- Measure your head about 1/8" above the ears; note inches or cm.
- Find the circumference in the Head (in) or Head (cm) column.
- Read across for US fitted, UK, EU, and letter size on the same row.
- Between sizes? Size up for rigid fitted and cowboy hats.
How to read this chart
US Fitted: Fraction sizes (e.g. 7 1/4) matched to head circumference in inches—common on fitted baseball caps.
UK Fitted / EU: Parallel systems; EU often tracks cm closely.
Head (in/cm): Your measured circumference—the most reliable input for hat size conversion.