Blonde Girl Playing At The Billiard Table

The bed
For World Pool-Billiard Association (WPA) tournament play, the bed of the pocket billiard table must be made of slate no less than 1 inch (2.54 cm) thick. The flatness of the table must be no greater than +0.020 inches (0.508 mm) lengthwise and +0.010 inches (0.254 mm) across the width.
Tables not for tournament play may often use a slate bed as well, but the slate may be less than 1 inch (2.54 cm) thick. Other materials used for pocket billiard table beds include wood (typically medium-density fiberboard) and synthetic materials under various trade names.