Despite the sport's name, softballs are not especially soft. The size of the ball varies according to the classification of play.
A 12-inch circumference ball is generally used in slow pitch, although in rare cases some leagues like recreational leagues they make use of a 14-inch circumference ball. Some balls have a raised seam, and others do not.
The ball is usually covered in white or yellow leather sewn together with red thread, although other coverings are permitted.