According to Titleist, multiple customization options are available when purchasing your Titleist Pro V1 golf balls. You can choose between white or yellow for the ball's color, which comes at no extra cost. Also, if desired, you can customize your ball's identification number to exceed the offered numbers of 1, 2, 3, or 4. This addition will cost an extra dollar, but it applies to all the balls in your order. If you want to personalize your balls further, you can add up to three lines of text on one side or six lines of text on both sides for an additional fee. While this makes the price slightly more expensive, it’s worth it to those experienced golfers who want to add a bit of personalization to their golf balls.