Our largest marbles are 1" or 25mm marbles and we call them Whoppers! The Whopper sized jewelry will fit those old shooter marbles from your childhood. We only offer pendants in this size. The effect of the large marble is astounding! Kits have 5 marbles including iridescents, greens, both opaque and translucent blues, orange ribbon cats eyes, and iridescent white. Gorgeous!