Carry this little magical treasure with you to remind you that secret entrances to the wizarding world may be just around the corner... if only your muggle eyes could see it... It's made with a copper ring in bronze tone, cadmium free. I printed the logo on HP quality matte photo paper and covered it with an epoxy clear plastic dome. The ring is adjustable and should fit most ring sizes =) The ring face diameter is about 16.7mm and the image is about 12mm. This little ring is pretty sturdy and can withstand getting caught in the rain but I would dry it off immediately. I do not suggest showering with it on or submerging it in water. Thanks for looking!