This a great mid weight raquet and great for power. I have used it for a few weeks and really effective. We are moving so need to sell so need to sell, details below. Grip size is 4 3/8. Endorsed by Novak Djokovic, this update to the Graphene Speed Pro is ideal for both strong intermediates and advanced players. Like the previous version, this is a maneuverable player's racquet with an impressive level of stability for its sub 12 ounce weight. The tight 18x20 string pattern will give big hitters the needed control to take huge cuts at the ball. New to this version is the next generation of graphene, called Graphene XT, which allows for an even more optimal redistribution of weight to the handle and tip. The result is a racquet that swings very smoothly and offers slightly easier access to power than the prior version. From the baseline this racquet's ultra predictable response supplies confidence on full swings, and the speedy feel makes it easy to ratchet up the pace and spin. Aggressive servers will appreciate how easily this stick moves through contact, and they will have the needed control to work the entire service box with pace and spin. The Speed Pro is simply a must demo for intermediate and advanced players in search of a maneuverable player's racquet that feels solid and keeps the ball on target.