Softball Sales 12" Weighted Training Softballs These weighted softballs are a great training aid for pitchers. As you train, gradually increase the weight of the ball as you increase the strength of your arm. All weighted training softballs are 12". Each ball is sold separately. Color coded ball cover indicates ball weight: Green - 9 oz. (12" softball) Blue - 10 oz. (12" softball) Yellow - 11 oz. (12" softball) Black - 12 oz. (12" softball) Weighted softballs also available as a set - Item #CSB7SET