Great for remodeling and new construction. Tiles apply to any substrate such as drywall plaster or old tiles. Multiple layout and pattern options are available. The descriptors long and short refer to the direction of the grain or brushing. One is brushed horizontally (long) and the other vertically (short). Each tile measures 3 x 6 . 8 tiles per box covers 1 sq ft. This product can expose you to chemicals which are known to the State of California to cause cancer. - Lead