Gi training uses a woven jacket, pants and belt; no-gi classes use a fitted rash guard with grappling shorts, spats or another gym-approved combination. If you compete, compare the exact garments with the current event rules, since IBJJF gi and no-gi requirements differ.
Choose the kit for the class format first, then check garment fit and event rules. A gi set and no-gi apparel differ in construction, sizing and the rules that apply at competition.
Compare the two formats
| Format | Main garments | What to compare before buying |
|---|---|---|
| Gi | Woven jacket, pants and belt | Maker’s size chart, fit, construction, color, patches and care directions |
| No-gi | Fitted rash guard with grappling shorts, spats or an allowed base layer | Separate size charts, fabric, coverage, waistband, pocket/closure details and event rules |
For ordinary classes, follow your academy’s dress code. Competitions can add requirements for colors, construction and fit, so do not assume a practice outfit qualifies.
Check the event’s uniform rules
The IBJJF uniform page describes gi material, color and measurement requirements. It says the gi should use woven cotton or cotton-like fabric and lists white, royal blue and black as permitted colors. Its page also specifies sleeve and pant fit checks.
For no-gi, the IBJJF page describes a skin-tight elastic shirt that covers the torso to the shorts waistband, along with requirements for shirt colors, rank colors and shorts construction. Details can differ by division. Read the current IBJJF uniform requirements for your category before ordering competition apparel.
Choose fit and care by garment
Gi labels such as A sizes vary by maker. Compare your height and weight with the exact brand chart and check its washing and drying advice. Rash guards, shorts and spats also have their own charts; a size from one garment type does not automatically transfer to another.
If you are choosing a gi, start with the BJJ gi sizing guide. For a no-gi kit, see the rash guard, shorts and spats guide and short- vs. long-sleeve rash guard comparison. The BJJ belt sizing guide covers belt lengths and colors. Browse BJJ and grappling.
Sources checked November 5, 2026
Common questions
What is the difference between gi and no-gi BJJ?
Gi training uses a jacket, pants and belt that opponents can grip. No-gi training uses fitted apparel such as a rash guard and grappling shorts or spats.
Can I wear the same clothes for gi and no-gi?
Not for all formats. Use a gi for gi classes, and ask your gym which no-gi garments it allows for that class.
What does IBJJF require for a gi?
The IBJJF uniform page specifies woven cotton or cotton-like material, permitted gi colors and fit checks. Review its current rules before entering an event.
What should I buy first for no-gi BJJ?
Start with the garment combination your gym accepts, then compare each rash guard, shorts or spats size chart and care label.