This is a collector case of target marbles.  The case itself is made of clear plastic and has 35 pockets that can hold 1 - 2 of the 5/8" size marbles.  We've designed a card that attaches to the back of the case with a picture of 35 different styles of marbles that we carry and their names.  All three cases comtain a "Classic Jabo" from the Jabo factory in Akron Ohio that has recently closed down and is no longer producing toy marbles.  All three also contain a "vaseline" marble, which are new marbles made from recycled glass that contains Uranium Oxide.  Shine a black light on the "vaseline" marble to see the Uranium inside flouresce.  If you buy all three of our cases, you will have one of every 5/8" marble style that we carry and pretty much every new machine made marble style that is available from all of the factories.  The case measures 7 1/2" wide x 8 1/4" tall x 7/8" deep.  Warning: Chocking Hazard.  Not recommended for children under 5 years old.