| Size | IN | CM | Hat Size |
| XS | 18.5-20 | 47-51 | 5 7/8 - 6 3/8 |
| S | 20.5-22 | 52-56 | 6 1/2 - 7 |
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Due to the Canada Post strike, Greenhawk will utilize alternate couriers. Most orders ship via FedEx. For PO box orders, please provide an alternate street address at checkout.
| Size | IN | CM | Hat Size |
| XS | 18.5-20 | 47-51 | 5 7/8 - 6 3/8 |
| S | 20.5-22 | 52-56 | 6 1/2 - 7 |