Modern tennis racquets vary in length, weight, and head size. 21 inches to 26 inches is normally a junior length, while 27 inches or 27.5 inches are for stronger and taller adult players. Weights of a racquet also vary between 8 ounces unstrung and 12.5 ounces unstrung. Head size also plays a role in a racquets qualities. A larger head size generally means more power, and a larger sweet spot that is more forgiving on off-center hits. A smaller head size offers more precise control.