There are sixteen billiard balls that are used during the game. There are fifteen colored balls that are attempted to knock into the pockets and the last ball is the cue ball. The cue ball is normally white and may have a couple black spots on it for measuring angles. The cue ball is the only ball that doesn’t have a number on it. The cue ball is used to hit the rest of the billiard balls.
The rest of the billiard balls are numbered one through fifteen, with eight being black. Numbers one through seven is referred to as solids and numbers nine through fifteen are regarded as stripes. This is because numbers one through seven has the number written in black surrounded by a white circle. However, the rest of the ball is a solid color. Numbers eight through fifteen got their name because instead of the rest of the ball being a solid color, the top and bottom area are filled in with white. Therefore, only a stripe of color is on the ball, hence the name stripes.
There is a color system to the billiard balls. Numbers one through seven correspond to same colors used in billiard balls nine through fifteen. Therefore, billiard balls one and nine are the same color and are both yellow. Numbers two and ten are both blue, numbers three and eleven are red, and four and twelve are either purple or pink (depending on what billiard ball set you have). Billiard balls of five and thirteen are both orange, and numbers six and fourteen are both green. Numbers seven and fifteen are the same color and will depend on what set you have. Although it is brown in the majority of billiard ball sets, it can be tan in some sets. The eight ball is always black.
In some pool tables, a larger pool ball may be used in order to take more money from the players. Although the cue ball is smaller than a baseball, it may be the size as big as a grapefruit. Also, it is suppose to be fairly light, but can be very dense like a rock. This change is done to maximize the separation that the cue ball has once it hits another ball. Some tables also use a magnetic ball that has the standard weight and size. Cue balls are rarely ever found smaller than the standard size or smaller than the rest of the balls.