Blackball (pool) number "8" (a holdover from kelly pool), though numberless variants are not unknown. British pool tables come in 6 × 3 foot (1.8 × 0.9 m) or 7 × 3.5 ft (2.12 × 1.06 m) varieties, with 7 feet being the regulation size for league play. The table has pockets just larger than the balls and rounded, as in the game of snooker, whereas the international-style (or "American-style") table has pockets significantly wider, with pointed . Tournament rules may require the presence of more than one type of (mechanical bridge), as in snooker. There are two competing standards bodies that
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