This is a Colored Dot Double 6 Domino Set with Professional Tiles. Double 6 has 28 tiles and 168 pips, or points. The set comes in a vinyl snap case as see in the picture. Professional size dominoes are 1 x 2 x 7/16 inches, as opposed to the standard size, 15/16 x 1 7/8 x 1/4 inches. This is a great set for a great price with red, black, green, blue and yellow dots!