IBJJF Gi Rules 2025: The Complete Checklist to Pass Inspection
It's competition day. Adrenaline is pumping, you're focused on the match... and suddenly, at the pre-check, the inspector tells you your gi isn't compliant. It's an unpleasant situation that can cost you your nerves, time, and sometimes even your spot in the tournament.
To ensure your day starts with the thrill of the fight and not a frantic search for a backup gi, we’ve prepared a comprehensive guide to the International Brazilian Jiu-Jitsu Federation (IBJJF) uniform requirements for 2025.
It's crucial to remember: In late 2024, the IBJJF updated its "Uniform Guide" and introduced an official Gi Checker tool. The main change is that the tolerance for sleeve and pant length has been reduced from 5 cm to 2 cm. This article reflects all the latest updates.
The Quick Checklist: What They'll Inspect on Your Gi
1. Color and Material
Approved Colors: Only white, royal blue, and black.
Uniformity: The jacket and pants must be the same color.
Collar: Cannot be a different color from the rest of the jacket.
Prohibited: Gis with prints or that are manually painted are not allowed. The only exception is for patches in the approved zones.
2. Jacket (Kimono) and Sleeves
Jacket Length: Must reach the thighs.
Sleeve Length: With the arm extended forward, the distance from the edge of the sleeve to the wrist must not exceed 2 cm (≈0.8 inches).
Sleeve Width: With the arm extended, the sleeve opening must be wide enough for the official 7 cm measurement tool to pass through easily. This ensures your opponent can get a grip.
3. Pants
Pants Length: The hem of the pants must be no more than 2 cm (≈0.8 inches) above the ankle bone (tibial malleolus).
Pants Width: The width of the pant leg from the knee down must be at least 7 cm (≈2.75 inches).
5. Belt
Width: Between 4 to 5 cm (1.6–2 inches).
Tip: A black tip for all belts up to black belt. Black belts may have a white or red tip.
Length: After tying the knot, the ends of the belt should hang down 20–30 cm (8–12 inches).
6. Undergarments
For Men: It is forbidden to wear a T-shirt or rash guard under the gi jacket. Briefs-style underwear is mandatory (not boxer shorts).
For Women: An elastic top (like a rash guard) under the jacket is mandatory. Leggings are permitted, but only if they are shorter than the gi pants.
7. Patches and Overall Condition
Placement: Patches are only allowed in strictly defined zones (refer to the official IBJJF diagrams). They must be neatly sewn on.
Prohibited: No embroidery or printing is allowed on the collar (on either side).
Condition: The gi must be clean, dry, free of unpleasant odors, and have no holes or tears.
Simple Self-Check: How to Measure Your Gi at Home
You don't have to wait until competition day. You can perform a quick check at home with a standard measuring tape. While this is only a preliminary measurement — the final decision always rests with the inspector and their official tools — it will help you avoid 99% of potential problems.
How to Measure:
Sleeve Length: Stand up straight and extend your arm parallel to the floor. Measure the distance from the crease of your wrist to the edge of the sleeve. It must be no more than 2 cm.
Pant Length: Stand up straight. Measure the distance from the most prominent bone of your ankle to the hem of the pants. It must be no more than 2 cm.
Collar Thickness and Width: Use a ruler or calipers. The thickness should be up to 1.3 cm, and the width should be about 5 cm.
Sleeve Width: Have someone measure the width of the sleeve opening while your arm is extended. It must be at least 7 cm wide.
Frequently Asked Questions (FAQ)
Q: My gi is designed to be two-tone — like a black gi with a red lapel. Is that allowed?
A: Nope. Even if the contrast is part of the design, IBJJF rules require the entire gi — including the collar — to be one uniform color. A colored lapel, even factory-made, is still considered non-compliant.
Q: My gi is clean, but it smells a little funky after training. Is that a problem?
A: Yes. If your gi smells bad, is damp, or looks worn out, inspectors can reject it on the spot. Think of it like checking into a hotel — fresh and clean wins.
Q: I’ve worn this gi to local comps with no issue. Why would IBJJF care now?
A: Local tournaments are often more relaxed. IBJJF majors use stricter tools — literal measurement blocks. What slides at home might not pass on the big stage.
Q: What’s the worst that can happen if my gi fails inspection?
A: You panic, scramble to borrow or buy another one (often overpriced on-site), miss your warm-up, and fight stressed. In some cases, you’re disqualified. All that because of 2 cm.
Q: Can I wear my flashy custom gi with anime patches?
A: Only if the patches are in the official zones. Anything outside those areas, especially on the collar, is a red flag. Keep your wild gi for the gym.
Q: I only have one gi. Should I risk it?
A: You can — but don’t. Bring a backup. Even a perfectly legal gi can fail due to last-minute shrinkage, bad luck, or a tough inspector.
Q: Can I stretch my sleeves at the venue to make them longer?
A: Some people try — steam, pulling, wet towel tricks. It rarely works in 10 minutes. Prep your gi days in advance. Stretching at the venue is more desperation than strategy.
Q: Do they actually use that 7 cm block?
A: Yes. And they don’t argue about it. If the block doesn’t pass through your sleeve, you're out. It’s not personal — it’s mechanical.
Now you're armed with the knowledge to pass any inspection with confidence. Spend 10 minutes checking your gi before the tournament, and you'll step onto the mats thinking only about the fight. Good luck!