Kids Toys, Christmas Gifts, "Playing Marbles" Glass Marbles By Toysmith. This sack of marbles has 24 small marbles approx 9/16 inches in diameter and one shooter Larger than 9/16. Colors vary. These marbles are a great way to add a little extra to that gift you bought for your child, better yet a great stocking stuffer. Great for marble games or replacements for your chinese checker board.