The regulation-size practice baseballs feature a resilient, high-density material that prevents cracking and deformation. Each ball measures 2.75 inches in diameter, sold in a set of 12. These training balls include 26 hollow holes for enhanced accuracy and a limited flight design, which reduces flight distance and delivers a realistic trajectory during hitting and pitching. They reliably rebound to their original shape even after repeated impacts. Teens and adults can safely use these durable baseballs for pitching, batting, throwing, and catching practice. They are suitable for indoor or outdoor settings to improve baseball and softball skills.