Length : 8.65　cm x 8.64 cm ( 3.41 inches x 3.40 inches)
Thickness of rim: 0.35　cm ( 0.14 inches)
Jidai(era) :　Muromachi period.
Weight: 72 grams.
Special feature: Round shape iron Ishimeji Tsuba, rudder are engraved with open work on left and right.
The taste of iron is exquisite.