This Display Case Measures; 7½" High x 4" Round 3½" Diameter Shelves that are 2" High with Seven ⅝" Holes per Shelf These Crystal Clear Plastic Stands work great for Displaying all Types of Collectibles Display Stand will hold 21 Marbles or Spheres up to 1¼ " Diameter This High Quality Crystal Clear Glass Dome includes a Brass Base with 3-Tier Acrylic Shelves No Marbles included