Our Domino racks are made of poplar lumber and are 11" wide 2 1/4" high and 1 1/4" wide. They are available in three stain colors Tobacco (which is the pictured stain) Espresso, and Red Oak. They are also available unstained. They will easily hold double nines. These racks can be used in a variety of games, so they are not limited to just the game of dominoes. This is a set of four domino racks.