Shodo (Japanese Calligraphy) and Tenkoku (Seal Carving) Tools: Inkaku (Seal Square) Length: Approximately 78mm Width: Approximately 137mm Thickness: Approximately 8mm This item was purchased and used by my mother a long time ago. I am selling it because I no longer practice calligraphy. *My mother wrote the date on the inside bottom of the box. Please confirm the above details before purchasing.