Science geek wooden key ring with wood burning Dopamine 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! IMPORTANT: This is a made-to-order item, it is NOT ready to ship, if you have a time constraint please plan your purchase earlier. Feel free to contact us about shipping method/time, we are happy to assist you. :) Measurements: Wood log slice, approx.55~65mm (Diameter) *Kindly note that wood log might have tiny natural flaw and will not be perfectly round as it is a natural material. 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.