This is a neat original Samurai era Tsuba, with the design theme of a woven grass Tatami Mat.
The Tsuba measures 2 13/16" x 2 11/16". It is 4 mm thick at the center, and tapers down to 2 mm thick at the rim. There are traces of gold overlay design as well. Overall, this Tsuba looks pretty old.
Guaranteed to be an original hand made Samurai era Tsuba, and not any kind of copy.