This seemingly straight forward ring has a playful twist. When viewed from the top, it looks like a simple polished ring, but when viewed from the side the sleek industrial shape is revealed. When you look through the "tunnel" you can see a small car. The design is suitable for both men and women. The Tunnel ring is approximately 8mm wide. The free-size feature has been carefully considered in the design. Although the ring can be adjusted, please specify your preferred ring size in the drop-down menu. Material: Britannia Silver 958 This piece is crafted in 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 can also make this piece in 23K Gold Vermeil (23K Gold Plated Britannia Silver 958) upon request. The price will be approximately 25% higher, and will take 3-4 weeks depending on availability. Please convo me for a more accurate quote if interested. ------------ We are a husband-wife, husband's-parents, and two-production-staff team. We make fun handmade, original pieces for fun people in our workshop/store in Ginza Tokyo. Come visit our store if you're in lovely Tokyo. Thank you for looking!