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 cutting and firing them in an electric kiln. They have 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 also contain air bubbles that were originally in the glass rods, and some have silver foil mixed in. Please refrain from purchasing if you are concerned about these imperfections. Some of the glass appears 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 7mm to just under 8mm wide. The measurements are taken from the back of the nuggets. If you have any questions or don't understand anything, please feel free to ask. 1300 yen #glass #electric kiln #handmade #nuggets #earrings #herbarium #seaglass art