Happiness Wooden key ring with wood burning Serotonin molecule. The design is burned free hand. The other side of the wood is left blank. You can choose to leave it blank, or send us your custom message/name(within 20 characters) to burn on it, for free! This listing is a READY-MADE item. What you see in the photos is exactly what you will received. A beautiful high quality key chain is used to ensure the durability of this product. Kindly note that wood log might have tiny flaw as it is a natural material. Measurements: Wood log slice, Approx.60mm (Diameter) For custom order you are welcomed to send me your ideas, I am happy to come up with the perfect gift for you. For bulk ordering, please contact me for a lower price.