The size standards for PVC baseball used in competitions need to match the requirements for regular baseball game balls. The following is a comparison of the relevant size standards:
In a formal baseball game, there are clear size regulations for baseball bats. Although the size standards for PVC baseball are not directly mentioned, the logical requirements for the size of the game ball and related equipment can be understood by referring to the baseball rules. The baseball bat must be a smooth round bat. The diameter of the thickest part must not exceed 2.75 inches (about 6.99 centimeters), the length must not exceed 42 inches (about 106.7 centimeters), and it must be made of a single piece of wood. However, in actual competitions, there are more detailed regulations for bats made of different materials and for different purposes. For instance, if the bat is not made of pure wood or pure aluminum, the performance factor (BPF) of the baseball bat must not exceed 1.15, or it must have the hitting elasticity Coefficient (BBCOR) certification, and the bat must have a clear certification mark.
For PVC baseballs used in competitions, their size standards usually need to be compatible with the competition bats to ensure the fairness and competitiveness of the game. Although the specific size standards for PVC baseball may vary depending on different game organizations or events, generally speaking, its diameter should be close to or slightly smaller than that of a standard baseball (about 7.2 cm to 7.3 cm) to ensure it can be hit and fly normally during the game. At the same time, the weight of the PVC baseball should also be controlled within a reasonable range to ensure that the batter can exert normal hitting power and skills.