BJJ Gi Rules: Requirements, Inspection & What to Wear

Every BJJ organization has rules about what your gi must look like and how it must fit. Getting this wrong can mean scrambling for a loaner gi minutes before your child's match — or worse, being disqualified.

IBJJF Gi Requirements:

• Colors allowed: White, royal blue, or black only
• Material: Cotton or cotton-like fabric. No rubber, plastic, or polyester gis.
• Top and bottom must match color — you cannot mix a white jacket with blue pants
• No rash guard visible under the gi jacket (except for female competitors, who must wear one)

NAGA Gi Requirements:

• Any color gi is permitted (NAGA is the most relaxed)
• Top and bottom do not need to match
• Material must be traditional gi weave

AGF Gi Requirements:

• Colors allowed: White, blue, or black
• Top and bottom must match
• Standard cotton weave required

JJWL Gi Requirements:

• Colors allowed: White, blue, or black
• Top and bottom must match
• Standard cotton weave required

Grappling Industries Gi Requirements:

• Colors allowed: White, blue, or black
• Top and bottom must match
• Standard cotton or bamboo weave

Recommendation for first-time competitors: Buy a white gi. It's accepted everywhere, by every organization, with no exceptions. A white gi is the safest investment you can make.

The gi must fit properly — not too tight (restricting grips for your opponent) and not too loose (safety hazard). IBJJF is the strictest about fit.

IBJJF Fit Requirements:

• Jacket sleeves must reach no more than 5 cm above the wrist bone when arms are extended straight
• Pant legs must reach no more than 5 cm above the ankle bone
• Jacket length must reach the thighs when the belt is tied
• Sleeve opening must have at least a 7 cm gap from the arm (measured at the wrist)
• Collar thickness cannot exceed a specific width — the referee must be able to grip it with four fingers

Why this matters for growing kids: Children grow fast, and a gi that fit perfectly three months ago may be too short now. Check sleeve and pant lengths before every tournament. Many parents keep one gi that's "tournament ready" and a slightly smaller one for daily training.

Common fit failures:

• Sleeves too short (the most common issue — kids outgrow sleeves first)
• Pants too short (second most common)
• Collar too thick or too frayed to grip
• Jacket too tight across the chest, limiting movement

Pro tip: Wash your gi in cold water and hang dry before a tournament. Hot water shrinks cotton gis, which can push already-short sleeves over the limit. If your gi is slightly too long, a hot wash can actually help bring it into spec — but this is risky to do the day before competition.

You can put patches on your gi, but placement is regulated — especially at IBJJF events.

IBJJF Patch Rules:

• Mandatory patches: Federation patch on the left shoulder (provided at registration or available for purchase)
• Academy patch: Allowed on the back of the gi jacket, chest, and shoulders
• Sponsor patches: Allowed in designated areas only
• No patches on the belt
• No patches covering required measurement areas (collar, sleeve openings)

Other organizations are generally less strict about patches. NAGA, AGF, JJWL, and Grappling Industries typically allow patches anywhere that doesn't interfere with grips or safety.

No-Gi Rashguard Rules:

When competing no-gi, the uniform rules change entirely:

IBJJF ranked rashguards are a unique requirement. Youth competitors need rashguards that match their belt color (white for white belt, grey for grey belt, etc.). Many BJJ brands sell IBJJF-compliant ranked rashguards. If your child competes at IBJJF no-gi events, you'll need to invest in the correct color.

Gi inspection can be stressful, especially for first-timers. Here's what to expect and how to handle a failure.

IBJJF Gi Check Process:

1. Before your division is called, competitors line up for gi inspection
2. A referee checks gi color, fit (sleeve length, pant length, collar), and overall condition
3. If the gi passes, you proceed to the bullpen to wait for your match
4. If the gi fails, you're given a set time (usually 5 minutes) to fix the issue or change into a compliant gi

Common failure scenarios and fixes:

• Sleeves too short: No quick fix. You need a different gi. This is why bringing a backup gi is essential.
• Collar too thick: Some referees will allow you to soften the collar by bending it, but this rarely works if the gi is genuinely non-compliant.
• Wrong color: You must change entirely. No exceptions.
• Torn gi: If the rip is in a grip area, you may be allowed to change. If it's cosmetic, some refs will let it pass.

If you can't fix it:

• At IBJJF, failure to present a compliant gi within the allotted time results in disqualification
• At NAGA and AGF, referees tend to be more lenient and may allow minor infractions
• At local Grappling Industries and JJWL events, gi checks are less formal

The backup gi rule: Always bring a second gi to every tournament. It doesn't matter if you've competed in the same gi 20 times — bring a backup. Gis rip, gis shrink, gis get lost. A $100 backup gi is cheaper than a missed tournament.

Hygiene requirements: All organizations require clean gis with no odor, no blood stains, and no mold. A visibly dirty or smelly gi will be rejected at inspection. Wash your competition gi the day before and inspect it yourself.