Just like the ORIGINAL TCB balls, but slightly smaller (the exact size as a baseball). TCB Weighted Baseballs develop strength and extension through the hitting zone. Provides instant feedback - hit it square or on the center line of the ball, and the shape remains round. If hit off center, the ball changes to a donut shape. 2.9 inches in diameter and weighs 15 oz. Available in 3-packs, 6-packs or by the dozen.