The Ultimate Guide to Finding Your Perfect Hat Size

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.

Why the Right Fit Matters?

Sure, many hats are adjustable - but that doesn’t mean they’re one-size-fits-all. A properly sized hat:

• Eliminates bounce or shifting during movement

• Avoids pressure points or forehead fatigue

• Feels like it was made for your head

When you get the sizing right, it shows in comfort, in performance, and in confidence.

How to Measure Your Hat Size?

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:

1. Wrap the tape around your head
Measure just above your eyebrows and ears, where your hat naturally sits.

2. Keep it snug, not tight
Aim for secure, not restrictive. If you’re between sizes, we recommend sizing up for better airflow and long-wear comfort.

3. Record your measurement
Jot it down in inches or centimeters. Measure a couple of times for accuracy, especially if your hairstyle varies day to day.

Alter Ego Running Hat Size Chart

Match your head measurement to the right fit below:

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.

What Else Affects Fit?

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:

• Hair style & volume: More hair = more room needed

• Hat structure: Structured crowns sit higher; relaxed profiles hug the head

• Closure style: Snapbacks, sliders, and stretch bands each create different pressure zones

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.

Our Hat Fits (At a Glance)

Each Alter Ego fit is built for a different vibe - here’s your quick cheat sheet:

• Coaster Fit: Structured, sleek, modern trucker with a higher crown & curved bill

• Trotter Fit: Timeless 6-panel classic with a lower crown & curved bill

• Drifter Fit: Flat brim modern style with a higher crown and horizontal shape

• Cruiser Fit: Unstructured, collapsible, and ultra-modern with a lower crown & medium curve

• Traveler Fit: Relaxed, functional, and versatile with a higher crown & curved bill

• Visor Fit: Performance-first, sporty, and practical with a curved bill for all-day wear

Our Fit Philosophy

We don’t believe in one-size-fits-most. We believe in a fit that feels personal. That’s why every Alter Ego running hat is designed and tested to deliver comfort, performance, and lasting durability.

• Every hat style is tested across a wide range of head sizes and shapes for a truly dialed-in fit

• Crafted from premium, breathable materials that are lightweight yet durable, built to hold their shape through miles of wear and performance demands

• Consistent fits you can trust — our Small, Standard, and X-Large adjustable snapbacks make it easy to find the right size for your head’s circumference and depth

• Adjustable closures fine-tune your fit even further, so every wear feels custom

• Not sure it’s the right match? Our fit guide makes it easy to find the best running hat, best athletic hat, best golf hat, best workout hat, or best performance hat for your style, and our team is always here to help if you need a swap.

You deserve a hat that fits like it was made for you. Whether you’re chasing miles or just looking for all-day comfort, Alter Ego hats give you a consistent fit you can rely on, every time.

Your Hat Fit Checklist:

• Wrap the tape just above your ears and brows

• Keep it snug, not tight

• Match your size to our hat size chart

• Consider the fit, style, structure, and closure

• Still unsure? Our Hat Fit Guide has your back (and your head)

Still Have Questions?

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.