The ball is a hard leather-based-seamed spheroid, that has a circumference of 9 inches (23 cm). The ball includes a "seam": six rows of stitches attaching the leather shell with the ball into the string and cork inside. The seam on a whole new ball is prominent and can help https://andyygels.tinyblogging.com/the-ultimate-guide-to-match44-id-79269879