Sizing
From: https://kateoatesdesign.com/sizing
Adult Hats
Metric
| Size | Small | Medium | Large |
|---|---|---|---|
| Circumference | 56cm | 58cm | 61cm |
| Diameter | 17.8cm | 18.5cm | 19.4cm |
| Length (crown to base of ear) | 21cm | 22cm | 23cm |
| Back of head (ear-to-ear behind the head, not including ears) | 21cm | 22cm | 32cm |
| Forehead (ear-to-ear across the forehead, not including ears) | 30cm | 31cm | 32cm |
| Jaw (ear-to-ear underneath the chin, not including ears) | 22cm | 23cm | 24cm |
| Ear-to-shoulder (middle of the ear to the top of relaxed shoulders) | 17cm | 17cm | 18cm |
| Mid-ear-to-crown (middle of the ear to top of crown) | 18cm | 19cm | 20cm |
Imperial
| Size | Small | Medium | Large |
|---|---|---|---|
| Circumference | 22in | 23in | 24in |
| Diameter | 7.00in | 7.33in | 7.66in |
| Length (crown to base of ear) | 8.25in | 8.75in | 9in |
| Back of head (ear-to-ear behind the head, not including ears) | 8.25in | 8.75in | 9in |
| Forehead (ear-to-ear across the forehead, not including ears) | 11.75in | 12.25in | 12.75in |
| Jaw (ear-to-ear underneath the chin, not including ears) | 8.75in | 9.25in | 9.5in |
| Ear-to-shoulder (middle of the ear to the top of relaxed shoulders) | 6.5in | 6.75in | 7in |
| Mid-ear-to-crown (middle of the ear to top of crown) | 7.25in | 7.5in | 7.75in |
Children’s Hats
Metric
| Size | Newborn | 3 months | 6 months | 12 months | 2 years | 3-5 years | 6-10 years |
|---|---|---|---|---|---|---|---|
| Circumference | 34cm | 41cm | 43cm | 46cm | 48cm | 51cm | 53cm |
| Diameter | 17.8cm | 18.5cm | 19.4cm | ||||
| Length (crown to base of ear) | 13cm | 15cm | 16cm | 17cm | 18cm | 19cm | 20cm |
| Back of head (ear-to-ear behind the head, not including ears) | 15cm | 16cm | 16cm | 17cm | 18cm | 19cm | 20cm |
| Forehead (ear-to-ear across the forehead, not including ears) | 16cm | 18cm | 20cm | 22cm | 24cm | 25cm | 27cm |
| Jaw (ear-to-ear underneath the chin, not including ears) | 14cm | 17cm | 17cm | 18cm | 19cm | 20cm | 22cm |
| Ear-to-shoulder (middle of the ear to the top of relaxed shoulders) | 5cm | 6cm | 6cm | 7cm | 8cm | 11cm | 11cm |
| Mid-ear-to-crown (middle of the ear to top of crown) | 11cm | 13cm | 14cm | 15cm | 16cm | 17cm | 18cm |
Imperial
| Size | Newborn | 3 months | 6 months | 12 months | 2 years | 3-5 years | 6-10 years |
|---|---|---|---|---|---|---|---|
| Circumference | 13.5in | 16in | 17in | 18in | 19in | 20in | 21in |
| Diameter | 7.00in | 7.33in | 7.66in | ||||
| Length (crown to base of ear) | 5in | 6in | 6.25in | 6.75in | 7in | 7.5in | 8in |
| Back of head (ear-to-ear behind the head, not including ears) | 6in | 6.25in | 6.25in | 6.75in | 7in | 7.5.in | 8in |
| Forehead (ear-to-ear across the forehead, not including ears) | 6.25in | 7.25in | 8in | 8.5in | 9.5in | 10in | 10.5in |
| Jaw (ear-to-ear underneath the chin, not including ears) | 5.5in | 6.5in | 6.75in | 7.25in | 7.5in | 8in | 8.5in |
| Ear-to-shoulder (middle of the ear to the top of relaxed shoulders) | 2in | 2.5in | 2.5in | 2.75in | 3in | 4.5in | 4.5in |
| Mid-ear-to-crown (middle of the ear to top of crown) | 4.5in | 5.25in | 5.5in | 5.75in | 6.25in | 6.5in | 7in |