A set of Double 9 Dominoes allows you to play some of the more complicated domino games.

Double 9's can also be used to add variety to the simpler games, or to allow more people to play them.

A Double 9 set contains 55 dominoes, with the numbers on the tiles ranging from 0 (or blank) to 9. In a double-nine set, there are ten suits (blank, 1, 2, 3, 4, 5, 6, 7, 8, 9), each with ten members. A double-nine is the "heaviest" domino; a double-blank is the "lightest" domino value.

Each set consists of 55 domino tiles with bright coloured dots and rule book, in a vinyl case.