A 8⅛ hat fits a head circumference of about 25½ inches (64.8 cm), covering heads from roughly 25.3 to 25.7 inches (64.3–65.3 cm). That is one step past where New Era, Flexfit and Richardson's published charts stop.
8⅛ hat size in inches and cm
| Hat size | Head (inches) | Head (cm) |
|---|---|---|
| 8 | 25⅛ (24.9–25.3) | 63.8 (63.3–64.3) |
| 8⅛ | 25½ (25.3–25.7) | 64.8 (64.3–65.3) |
| 8¼ | 25⅞ (25.7–26.1) | 65.8 (65.3–66.3) |
The maths: 25.53 in ÷ 3.1416 = 8.125, which is 8⅛ (written 8 1/8 on a lot of labels). Full range on the hat size chart.
How common is a 8⅛ head?
In the US Army's ANSUR II survey (4,082 men and 1,986 women measured), the median head circumference was 57.4 cm for men and 56.0 cm for women, and the 95th percentile was 60.1 cm for men and 59.7 cm for women. An 8⅛ head (64.3–65.3 cm) is more than 4 cm above the men's 95th percentile. The published ANSUR II summary doesn't give percentiles this far out, so we can only say it's very uncommon. Uncommon isn't the same as unheard of, though, and it doesn't mean you should settle for a hat that squeezes.
8⅛ in New Era, Flexfit and Richardson sizes
| Brand / model | Your size |
|---|---|
| New Era 59FIFTY (fitted) | Not listed (chart stops at 8) |
| New Era 39THIRTY / 9FORTY | No |
| Flexfit 6277 | No: XL/2XL tops out at 8 |
| Flexfit 110 (one size) | No: max 7⅞ |
| Richardson 112 / 112 XL | No: about 7⅞ max |
Brand figures come from each maker's published size chart. Details and caveats in our fitted hat size chart by brand.
Do one-size caps fit a 8⅛?
No. An 8⅛ is past every one-size and stretch-fit cap in the three brands' published charts. The best a standard cap can do is a 59FIFTY in 8, which will be about ⅜ inch (1 cm) too small.
Does MONGO fit a 8⅛?
Yes. 8⅛ is in the upper-middle of MONGO's range (7½–8½, 60–68 cm). You'll have a couple of snaps of room left.
This is exactly the gap MONGO was made to fill: the sizes where the mainstream charts simply end.
Try the XL Performance Snapback 2.0 ($59.99, 7 colours) or the XL Foam Trucker ($44.99). Free US shipping and a 30-day fit guarantee: if it doesn't fit, we cover the return shipping.
Neighbouring sizes
- 8 hat size (one size down)
- 8¼ hat size (one size up)
- Full hat size chart
- Hat size calculator
- How to measure your hat size
8⅛ hat size FAQ
What is 8 1/8 hat size in cm?
About 64.8 cm, covering heads from roughly 64.3 to 65.3 cm.
What is 8 1/8 hat size in inches?
About 25½ inches, for heads from roughly 25.3 to 25.7 inches.
What hat size is 65 cm?
65 cm (25⅝ in) is an 8⅛.
What hat size is 25.5 inches?
A 25½-inch head is an 8⅛ (25.5 ÷ 3.1416 = 8.12).
Does New Era make an 8 1/8?
Not according to its published 59FIFTY chart, which stops at size 8.