This is an original Mermaid-chan mug from Mermaid Coffee Roasters. I believe it was not for sale. 8.5cm x Height 7cm It's old, and was stored in the china cabinet at my parents' house. It's a Showa retro item. There is a small chip on the bottom. There are also small stains due to aging. Please refrain from purchasing if you are sensitive to these issues, as it has been stored for many years.