|Major League baseballs are the standard for
baseballs. They have a standard size (9 to
9.25 inch circumference), although youth
leagues may use a slightly larger ball.
The basic difference among baseballs
the cover material, the stitching,
- Baseballs are available in leather and synthetic
covers. Leather baseballs are the standard,
are more durable, and maintain their shape
better. However, a synthetic cover stays
cleaner and is less expensive, making it
a consideration for a practice ball.
- Rolled stitching keeps the ball's profile
smoother and more aerodynamic; rolled stitching
is the standard. Raised stitching balls are
also available; the raised stitching catches
the air better than a rolled stitched ball
thus making it easier to control when teaching
- A baseball has many layers below the cover.
At the core is a cork ball that is wrapped
in rubber and then with thread. The standard
is at least 85% wool in the thread so that
the ball retains its shape after being hit.
Different cores (such as a rubber ball) or
lower wool content in the thread are used
in lower priced balls, but these may not
hold up to high impacts.