Purchased from a Chrome Hearts authorized dealer in Nagoya. Please utilize the authentication service as only the item itself is available, with no accompanying invoice or other accessories. Used for several years and then stored for many years. After researching, although there may be slight variations depending on the website, 18mm = size 16 (Japan). As a result of measurement, as shown in the photo, it is 18mm, size 16. Returns are not accepted to prevent product substitution, so please consider this before purchasing. ▪️The price is set considering the purchase price and the condition of the item, but primarily at a price I'm comfortable letting it go for. ▪️Please purchase only if you understand that this is a used item and that measurements, inspections, and storage are done by an amateur. Please refrain from purchasing if you are overly concerned about details.