Guides · 6 min read ·
BJJ gi size guide.
A0 to A5 explained, plus when to choose a long or heavy cut — and how to keep your gi from shrinking.
By the EIGHTY8 coaching team
A gi that fits well is legal for competition, harder for your opponent to grip, and simply more comfortable to train in. Here's how to get the size right the first time.
How gi sizes work
Adult gis are sized A0 to A5. Sizing is based on height first, then weight. Height decides sleeve and pant length; weight decides how much room you need in the jacket.
Gi size chart
| Size | Height | Weight |
|---|---|---|
| A0 | 152–160 cm (5'0"–5'3") | 45–55 kg |
| A1 | 160–170 cm (5'3"–5'7") | 55–68 kg |
| A2 | 170–180 cm (5'7"–5'11") | 68–82 kg |
| A3 | 180–188 cm (5'11"–6'2") | 82–95 kg |
| A4 | 188–195 cm (6'2"–6'5") | 95–110 kg |
| A5 | 195 cm+ (6'5"+) | 110 kg+ |
Use the gi size calculator to get a recommendation instantly.
Long (L) and heavy (H) cuts
If your height and weight fall into different sizes, you have two options:
- Long (e.g. A2L) — for athletes who are tall for their weight. Longer sleeves and pants, same body width.
- Heavy (e.g. A2H) — for athletes who are heavier for their height. Wider jacket and pants, same length.
Competition rules
Under IBJJF rules, the sleeve must reach within 5cm of the wrist with the arm extended, and the jacket skirt must reach the thigh. A gi that is too short can get you disqualified at weigh-in — another reason to size by height first.
How to stop your gi shrinking
- Wash cold (30°C or below), inside out.
- Hang dry out of direct sunlight — never tumble dry.
- Our gis are preshrunk, but heat can still shrink cotton by several centimetres.
Ready to choose? Compare the Pearl Weave Gi for daily training and the Gold-Weave Pro Gi for competition.
