Made with laser cut birch wood and surgical steel posts and backings. Great for sensitive ears! Free of Nickel, Lead and Cadmium Approximately 9.5mm across. Care and other info: Remove before showering, swimming, and sleeping. Due to natural differences in wood and hand painting you will see slight variations from one piece to another however this only increases their originality and sentiment. Colors may appear slightly different from one computer screen/device to another.