Size: Each flat marble beads is 15mm/ 0.6 inch in diameter.They have smooth surface and light can pass through them. Packing: There are 630 pieces in a bottle (15 oz approx),great as christmas and new year's gifts for men or women. Looks: Beads use transparent plastic with various bright colors to make them look more shimmering under the light.They are great for circular magnets making. Usages :Not only are they good choice for vase filler and table scatters, but also they are very suitable for decorating fish tank, fountain and any other occasion where is exposed to the light. Notes: Rinse beads before using them can have a better user experience. Please kindly noted that they are faux gems, not the real ones.