Thank you for looking. These are a set of handmade koala buttons by the Australian knitwear brand "BONZ". Each one is handmade with an elaborate design. They look great on thick clothing like coats and sweaters. The diameter is about 2.8cm, and the thickness is about 0.5cm. As shown in the photos. I believe I received these as a souvenir from Australia. They have been stored in a paper bag for a long time. Although they are new and unused, they have been handled by someone, so please understand that they are USED.