Billiard table all six pockets), with rounded entrances and nearly parallel sides, like those on a snooker table. One tactical consequence of this design difference is that the jaws of the WPA-type pocket are often used exactly like a horizontal version of the backboard of a basketball goal, to rebound the ball into the pocket; this technique does not work on blackball tables, and even shots down the cushion into a corner pocket are more difficult. For tournament competition under WPA world-standardized rules (and league play under derived rulesets), the bed of the pocket billiard table must be made of slate no
English billiards balls (52.5 mm or in with a tolerance of 0.05 mm) and they must weigh the same to a tolerance of 0.5 g within a set. The balls are designated as: The billiard table used has the same dimensions as a snooker table, (and in many venues, both games are played on the same equipment). The playing area of a standard tournament table measures 11 feet 8 inches by 5 ft 10 in (3.569 m by 1.778 m) with a tolerance of inch (1.26 cm) in both directions, though smaller ones, down to half size, are often found in snooker