This set comes with 28 plastic domino tiles, and a hard-plastic case to keep everything contained. On the dominoes themselves, you'll find large, raised dots to indicate the number on each side, and a tactile line down the center. Each domino even has a rough-textured back, to help keep the tiles from sliding around on the table. Tiles measure two inches long and an inch wide, and are made of solid plastic for a playing piece that's absolutely indistructible.