What is the length of a snooker table?

Full size snooker tables (or more correctly English Billiards tables) are generally considered to be 12' x 6', but the playing area is defined in the rules thus:

Dimensions

(a) The playing area within the cushion faces shall measure 11 ft 8½in x 5ft 10in (3569mm x 1778mm) with a tolerance on both dimensions of +/_ ½ in (+/_ 13mm).

Height

(b) The height of the table from the floor to the top of the cushion Rail shall be from 2ft9½in to 2ft 10½in (851mm to 876mm).