1. 6 oz: A lightweight option, suitable for children, teenagers, and some female fighters for training or competitions, also used in MMA. It features high flexibility and fast punching speed, ideal for practicing accuracy. However, its protection is weak, and the striking impact is direct. 2. 10 oz: Used in amateur competitions (teenager and female categories) and daily professional training. It offers better protection than the 6 oz model, can cushion striking force, balances flexibility and protection, and is great for refining technical details. 3. 12 oz: Applied in professional competitions (light/middleweight), high-intensity sparring, and strength training. It has thick padding and excellent protection, disperses impact effectively, delivers strong punching pressure, and helps build power and endurance. 4. 14 oz: For professional competitions (middleweight and above), heavy sandbag hitting, and suitable for power-type fighters. It provides the strongest protection and good wrist support, but its weight affects punching speed and requires more physical fitness.