Fitting an adult Gi for IBJJF (International Brazilian Jiu-Jitsu Federation) competition is essential to ensure comfort, mobility, and compliance with the rules. Let’s dive into the details:

1. GI Material and Color:

   • The gi (kimono) must be made from woven fabric (usually cotton or cotton-like material).
   • Permissible gi colors are white, royal blue, or black.
   • Gis with tops and pants of different colors are not allowed.
   • Collars should match the rest of the gi in color.

2. GI Size Requirements:

   • When your arm is extended straight parallel to the ground:
     • The gi top should reach your thigh.
     • Sleeves should be no more than 5 cm from your wrist.
     • Gi pants should reach no more than 5 cm above the ankle bone (tibial malleolus).
   • Verify official measurements:
     • GI lapel thickness: 1.3 cm
     • Width of GI collar: 5 cm
     • Sleeve opening at full extension: 7 cm.

3. Belt Requirements:

   • Use a durable belt (4 to 5 cm wide) that corresponds to your rank color (e.g., white, blue, purple).
   • Black belts have a black tip; other ranks have a white or red tip.

4. Additional Considerations:

   • No shirt under the gi top (except for women).
   • Women can wear a stretchy or elastic shirt beneath the gi.
   • Pants under gi pants are prohibited (except for women, who can wear shorter elastic pants).
   • Undergarments must be worn (no thong-type undergarments).

Remember, following these guidelines ensures fair competition and adherence to IBJJF rules. Happy training! 🥋👊

For more details, you can refer to the official IBJJF uniform rules