I’ve got 7 sets of 10mm Itty Bitty size marbles for your GAYM earrings or you could use them for your ring and give a set to a friend. 2 each of the following colors: red, yellow, teal, green, cobalt blue, opaque black, crackle clear. These are all authentic Got All Your Marbles Marbles. Will fit your interchangeable jewelry. 10mm size 3/8”