The marbles in this section are larger Millennium 50mm marbles. Machine made marbles are never exact in size and vary from marble to marble. The sizes of marbles are all approximate. The approximate size of these marbles are 2 inches. Please also be aware that the colors often vary in machine made marbles from one batch to another. So they might not all be exactly the same. Also the larger the machine made marble is the more often you will see folds where the glass was swirled together and are beautiful but not always as perfect as the smaller marbles. They are harder to produce and much harder to come by. They come in much fewer styles than the smaller size marbles.