What Else Affects Fit?
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We’ve all been there: a hat that rides too high, squeezes too tight, or won’t stay put halfway through your run. It’s more than a minor annoyance; it’s a distraction. And when you're logging miles, chasing goals, or just trying to clear your head, you deserve gear that works with you, not against you.
That’s why finding your perfect hat size matters. A dialed-in fit means no mid-run adjustments, no forehead pinch, and no post-run headaches. Just breathable, secure coverage that keeps up, stride for stride.
So we built this no-nonsense hat sizing guide to help you measure up and lock in your best fit - using a hat size chart, a measuring tape, and real-world tips from our product team.
Sure, many hats are adjustable - but that doesn’t mean they’re one-size-fits-all. A properly sized hat:
When you get the sizing right, it shows in comfort, in performance, and in confidence.
No tailor required. Just grab a soft measuring tape (or a string and ruler if you're in a pinch). Here’s how to measure your hat size:
| Size | US Hat Size | Inches | Centimeters (CM) |
|---|---|---|---|
| Small (S) | 6 ½ - 7 ⅛ | 20.5" - 22.4" | 52 - 57 CM |
| Standard (Std.) | 6 ⅞ - 7 ½ | 21.7" - 23.6" | 55 – 60 CM |
| (Most Popular) | 6 ½ – 7 ⅛ | 20.5” - 22.4 | 52 - 57 CM |
| X-Large (XL) | 7 ⅛ - 7 ⅞ | 22.4" - 24.8" | 57 – 63 CM |
Pro Tip: Always check the brand's hat size guide – sizing can vary slightly between manufacturers. And if you're between sizes? Size up – your forehead will thank you.
Sizing is just one piece of the puzzle. According to our team (and thousands of athletes like you), these real-world factors also affect how a hat feels:
At Alter Ego Running, every hat is built with movement in mind. We use breathable fabrics, flex-fit panels, and adjustable closures that adapt to you - not the other way around.
Each Alter Ego fit is built for a different vibe - here’s your quick cheat sheet:
We get it, hat sizing can feel tricky. Whether you’re shopping your first Alter Ego or dialing in your tenth, we’re here to help.
Shoot us a message, we’ll make sure you find a fit that works as hard as you do.
Meet the coaster fit, our modern interpretation of a timeless classic.
Meet the coaster fit, our modern interpretation of a timeless classic.
Introducing the trotter fit, our modern interpretation of a classic hat that is sure to impress.
Elevate your running game with the cruiser fit - a premium, unstructured running hat that looks and feels fast, while The drifter fit was designed with modern style in mind, featuring a horizontal shape and flat brim that offer a sleek and contemporary look.
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