How Should a BJJ Gi Fit?

How Should a BJJ Gi Fit?

A Brazilian Jiu-Jitsu gi should let you move, grip and train comfortably. It should not feel like ordinary loose clothing, but it should not pinch, restrict your breathing or make simple movements difficult.

The best fit is practical. Brand sizing differs, and gis can shrink after washing, so treat the label as a starting point rather than a guarantee.

How should a BJJ gi fit?

Try the gi on with the clothing you would normally wear underneath. Lift your arms, squat, bend and move through a few comfortable training positions.

You should have room through the shoulders, hips and knees. The trousers should stay secure without digging in. The jacket should sit comfortably across the back and chest without feeling strained.

If the gi restricts a normal range of movement before it has been washed, it is unlikely to become more comfortable in class.

Look at sleeves, trousers and the collar

There is no single measurement that works for every person or every competition rule set. Instead, look for a balanced fit:

• Sleeves should not be so long that they interfere with your hands or so short that the jacket rides up.

• Trousers should allow you to bend and kneel without pulling tightly at the knees or waistband.

• The collar should lie flat and feel substantial without pressing uncomfortably around the neck.

• The jacket hem should cover the torso in a way that feels secure when you move.

If you plan to compete, check the rules of the specific event before buying. Competition requirements can differ between organisers.

Allow for washing and shrinkage

Follow the manufacturer’s care instructions. Many cotton gis change size after washing or drying, particularly when exposed to heat.

When in doubt, avoid guessing. Ask the supplier about the fabric and its expected shrinkage, and wash the gi carefully before deciding it is the wrong size. Do not alter a gi solely to meet a competition rule without checking the event requirements first.

Comfort and cleanliness matter

A gi is training equipment. Keep it clean, dry it thoroughly and repair damaged stitching before it becomes a bigger problem.

For class, bring a clean gi, wear appropriate clothing underneath if you prefer, keep fingernails and toenails trimmed, and use flip-flops when moving off the mats. You can read more in our BJJ hygiene and mat etiquette guide.

Ask before you buy

If you are new to BJJ, it is worth asking your coach before making a purchase. They can help you understand what is suitable for your classes and whether a particular gi is appropriate for the way you plan to train.

At The Kodokan, a regular Introduction is the simplest starting point. Request an Introduction and we will help you prepare for your first session.