We made Hanryo for customers who prefer smaller pens. The pen's total length, with cap closed, is 5‑13/16” (140mm); the barrel's diameter is 11/16” (15mm) and is made of ebonite. It uses a standard cartridge‑convertor system. These pens use simple, traditional designs as well as some with Haiku and Waka. If you have any questions about the designs, Haiku or Waka, please let us know.