Stop Guessing Your Rash Guard Size

You train hard. You roll harder. But if your rash guard doesn’t fit right? You’re already fighting an uphill battle.

Let’s fix that.

Whether you’re shopping for yourself, your partner, or your little grappler, we’ve got your back (literally). Use our fun, fast, and freakishly accurate BJJ Rash Guard Size Calculator to find your perfect fit.

BJJ Rash Guard Size Calculator

Just enter your info. We’ll give you a size faster than a flying armbar.

Men’s Rash Guard Size Calculator

Women’s Rash Guard Size Calculator

Kids’ Rash Guard Size Calculator

Fit Tips from BJJ Vets

• No-Gi? Go tighter to reduce grips.
• Wearing under a gi? Standard fit = comfort + movement.
• In between sizes? Size up for comfort, down for performance.
• Don’t panic if it feels tight. Rash guards loosen slightly with wear.

FAQs About BJJ Rash Guard Sizing

Q: What if I'm between two sizes? A: Size down for a tight fit, up for a looser one.

Q: Will my rash guard shrink? A: Slightly — especially in hot water or dryers. Stick to cold wash, hang dry.

Q: Can I return it if it doesn’t fit? A: Yes! We’ve got a no-sweat return policy.