No. A heavier glove does not hit harder, nor does it hurt the opponent more. Choosing a heavier glove is more about ensuring the safety of you and your partner than about inflicting damage on an opponent. Heavier gloves have more padding, designed to better soften the blow of a hard hit as you leverage your body weight into a punch. To hit harder, work on improving your technique - not sizing up your gloves. If you want to improve your form and try some drills and workouts, learn about the best boxing and punching techniques for beginners by reading more articles on our blog.