Thank you for viewing! This set will be shipped via standard mail. These are glass nuggets made by layering various colors on glass rods, then firing them. They are cut and fired in an electric kiln, with patterns on both the front and back. They are cut with a glass cutter, so some nuggets may have cut marks, black spots, or roughness. Some nuggets may also contain air bubbles that were originally in the glass rods, or silver foil. Please refrain from purchasing if you are concerned about these imperfections. Some of the glass may appear different colors under natural light and fluorescent light. As these are glass, they may break with strong impact. Please check the size using the ruler in the second and third photos. The size is approximately 8mm to 9mm wide. The back of the nuggets is measured. If you have any questions or don't understand anything, please feel free to ask. 1350 yen #glass #electric kiln #handmade #nuggets #earrings #herbarium #seaglass art