4 1/4 grip size 

A thin rubber material in the shaft dampens harsh vibrations without compromising the crisp and connected feel that is so crucial to control. The other material technology Sonic Core lives in the upper hoop, and it softens impact shock with a uniquely flexible substance called Infinergy. This stick also benefits from a PowerGrid StringTech system, which optimizes string spacing to create a more comfortable, spin-friendly, responsive hitting experience.