The ball is a hard leather-based-seamed spheroid, having a circumference of 9 inches (23 cm). The ball incorporates a "seam": 6 rows of stitches attaching the leather-based shell with the ball for the string and cork inside. The seam on a different ball is well known and aids the bowler https://match4420875.blogitright.com/35662588/a-review-of-match44