9FORTY A-Frame Boston Red Sox Upside Down Navy Snapback
9FORTY A-Frame Boston Red Sox Upside Down Navy Snapback
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Show your Red Sox pride with this New Era 9FORTY A-Frame snapback.
Featuring a navy crown & visor with an upside-down embroidered Boston Red Sox logo, it delivers a structured A-Frame fit, adjustable comfort, and street-ready style—perfect for game day or everyday wear.
Headwear Size Guide
Fitted
There is no size adjustment function such as 59FIFTY and WM / work cap. Sizes are developed in increments of about 1 cm for an individual fit.
MY1ST
| Fitted Size | Head Circumference (cm) |
|---|---|
| 6 | 48.3 |
Kids
| Fitted Size | 63/8 | 61/2 | 65/8 | 63/4 |
|---|---|---|---|---|
| Head Circumference (cm) | 51.1 | 52 | 53 | 53.9 |
Adult
| Fitted Size | 7 | 71/8 | 71/4 | 73/8 | 71/2 | 75/8 | 73/4 | 77/8 | 8 | 81/8 | 81/4 | 83/8 | 81/2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Head Circumference (cm) | 55.8 | 56.8 | 57.7 | 58.7 | 59.6 | 60.6 | 61.5 | 62.5 | 63.5 | 64.5 | 65.5 | 66.5 | 67.5 |
Adjustable
Adjustable with a belt. Size can be adjusted by approximately 2 cm at the front and back. (There may be individual differences.)
9FIFTY
| Model | Fit Range | Head Circumference (cm) |
|---|---|---|
| Low Profile 9FIFTY 9FIFTY Retro Crown |
Small – Medium | 55.8 – 59.6 |
| 9FIFTY Stretch 9FIFTY Original Fit 9FIFTY Original Fit A-Frame |
Medium – Large | 57.7 – 61.5 |
9TWENTY / 9THIRTY / 9FORTY
| Model | Head Circumference (cm) |
|---|---|
| The Golfer 9TWENTY 9THIRTY 9FORTY 9FORTY A-Frame |
56.8 – 60.6 |
Adjustable
Bike / Messenger
| Model | Head Circumference (cm) |
|---|---|
| Bike cap Messenger cap |
57.7 – 61.5 |
Adjustable (WM-01 / 9FORTY)
| Model | Head Circumference (cm) |
|---|---|
| WM-01 Adjustable 9FORTY D-Frame Jet Cap Sun Visor |
55.8 – 59.6 |
Stretch Fit
39THIRTY uses stretchable material and fits flexibly.
| Model | Size | Head Circumference (cm) |
|---|---|---|
| 39THIRTY | Small – Medium | 54.9 – 57.7 |
| Medium – Large | 56.8 – 60.6 | |
| Large – XLarge | 59.6 – 63.5 |
Hat / Hunting
Hat and hunting styles (e.g. bucket hat, adventure) developed in 3 sizes.
| Model | Size | Guide (cm) | Head Circumference (cm) |
|---|---|---|---|
| Bucket Adventure The Fedora |
S / M | 57 cm | 55.8 – 57.7 |
| M / L | 59 cm | 57.7 – 59.6 | |
| L / XL | 61 cm | 59.6 – 60.6 |
Kids Adjustable
Adjustable belt. (Ranges are a guide; individual differences may apply.)
| Model | Head Circumference (cm) |
|---|---|
| MY 1st 9FIFTY | 48.3 – 50.1 |
| Child 9FIFTY | 50.1 – 53.9 |
| Youth 9FIFTY Youth 9TWENTY Youth 9FORTY |
52.0 – 55.8 |
| Youth WM-01 Adjustable | 53.0 – 56.8 |
Golf Line Adjustable
| Model | Head Circumference (cm) |
|---|---|
| WM-01 Adjustable Sun Visor | 55.8 – 59.6 |
Golf Line Adjustable: Women's
| Model | Head Circumference (cm) |
|---|---|
| WM-01 Adjustable Sun Visor | 54.9 – 58.7 |
| Sun Visor | 52.0 – 55.8 |
* The numbers around the head on the size chart are just a guide. Please note there are individual differences in fit.