The Sacred Pinecone ring was inspired by a good friend of mine Ben. Ben owns and operates “Sacred Geo Pinecones.” Hints the name of the ring. This design is made out of Genuine Pinecones hand picked in my home state of Oregon. This design is also made with Carbon Fiber for durability and a wonderful contrast. This ring is great for firefighters and emergency crew that need a ring to be cut in the case of an emergency. Millimeter varies depending on size of ring. Can be made in sizes 6-15. If a bigger size is needed please email me. All sales final.