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
Billiard ball cue ball. "(See snooker for more information on ball setup.)" The colour balls are sometimes numbered American-style, with their point values, for the amateur/home market, as follows in the adjacent table. Snooker balls are technically standardized at in diameter within a tolerance of plus or minus . No standard weight is defined, but all balls in the set must be the same weight within a tolerance of . However, many sets are actually , even from major manufacturers. Snooker sets are also available with considerably smaller-than-regulation balls (and even with ten instead of fifteen reds) for play on smaller tables