SPECS: Dimensions: 4.6 x 8.5 x 5.3 in. DESIGN & DETAILS: The official volleyball of USA volleyball FIBA approved Premium microfiber composite cover Nylon wound Provides exceptional, top-of-the-line performance including increased visibility, enhanced flight stability, and more accurate overhand passing and sets Designed with Molten's FLISTATEC Flight Stability Technology that optimizes the air-current around the ball in flight, while enhancing grip for more control and consistency Product ships deflated