Gi

The gi (also called kimono or quimono) is the traditional uniform worn in Brazilian Jiu-Jitsu. It consists of a heavy cotton jacket, reinforced pants, and a belt that indicates rank. The gi is a functional part of the sport — athletes grip the collar, sleeves, and pants of the opponent's gi to control movement, apply chokes, and execute techniques. Gi competition is considered the more traditional form of BJJ and features a distinct set of techniques that rely on the uniform's material.

Gi competition has specific rules about the uniform that vary by organization. IBJJF requires gis to meet strict specifications: the jacket must reach the thigh, sleeves must reach within 5cm of the wrist, pants must reach within 5cm of the ankle, and the gi must be white, blue, or black. Patches and embroidery are regulated. NAGA is more lenient on gi specifications. AGF follows IBJJF standards closely. Grappling Industries accepts standard competition gis without overly strict measurements. All organizations require the gi to be clean and in good condition — torn or excessively stretched gis can be rejected by the referee.

For youth competitors, the gi is the standard competition uniform for most kids' divisions. Parents should invest in a properly fitted competition gi rather than using a loose training gi. An oversized gi gives opponents excessive material to grip, putting the wearer at a disadvantage. Most academies sell or recommend specific competition gis. Parents should also be aware that gi sizes run differently across brands, and the gi will shrink when washed in hot water. Having at least two gis is recommended for competitors in case of damage or if competing in multiple divisions on the same day.