This is a miniature keychain of a Showa retro-style air freshener plug. It is unopened and a rare item. This is a rare item from about 25 to 30 years ago. This is an amateur measurement, but it is 2.8 cm. Please understand that there may be some errors due to amateur measurement. Please check the images for condition due to age and storage. It has been carefully stored. Please refrain from purchasing if you are sensitive. We ask for your understanding before purchasing. Immediate purchase is okay.