Excellent Sling Shot Ammo! Sling Shot Ammo 1000 pcs. Size is approximately 0.62 inch The marbles in this set can be used in games of skill, traded with friends or for the simple pleasure of studying their unique patterns. Perfect for indoor or outdoor play. Made of 100% glass. For Ages 6 and up - Fun for the whole family! - Size is approximately 0.62 inch Cats Eyes Glass Marble / Sling Shot Ammo 1000 pcs,Size is approximately 0.62 inch