Set of four individual racks.  Each rack has three rows with a slightly tilted angle (15°) as seen in the photos.  Hand-made from 0.75" unstained pine measuring 2.5" wide and 8.5" long.  8.5" width allows plenty of space, so no need to crowd the dominoes.  Most plastic or porcelain type dominoes will fit.   These holders work great for Mexican Train and many other domino games.  DOMINOES NOT INCLUDED.  Made in USA.  Thanks for looking!