The design of these super cute earrings (pierce type) is based on air bubbles rising in water. The Japanese word "Buku Buku" is the sound that this action creates. A soft texture has been applied to the surface, creating a warm feeling. The mini earrings have three "bubbles" each and are approximately 14mm long. Material: 23K Gold Vermeil (23K Gold Plated Britannia Silver 958) This piece is crafted with a base of Britannia Silver 958, a high purity silver which retains its bright color (unlike sterling silver which tarnishes easily). We also provide a small zip lock bag in which we recommend to store your piece/s to keep them away from the air. This will help to keep them bright for a long time. We usually have this piece in stock, however as we make each piece one-by-one, occasionally we are out of stock. If you would like to know the stock status, please contact me. Alternatively, if an order is placed and we are out of stock, I will contact you. Our handmade production process takes approximately 2-3 weeks.