This ball has a small blue Aramith logo on its surface. One advantage of a marked cue ball is that it makes a great practice ball. You can use the mark as a target, and then compare your chalk mark with the position of the dot or logo to see if you indeed stroke properly and hit the cue ball where you intended.
The ball is regulation 2-1/4" in diameter and is regulation weight. It is made in Belgium by Aramith.