Question: are there different size baseballs?
Answer: Size: Baseballs vs. Softballs – Baseballs measure up to 9-1/4 inches in circumference, and weigh about 5-1/4 ounces. Unlike baseballs, which are all the same size regardless of league, softballs come is a variety of circumferences: 16-inch, 14-inch, 12-inch (standard), 11-inch, and 10-inch.