Its ryome is 38 monme 8 rin according to the document of Kin-za (an organization in charge of casting and appraising of gold during the Edo period), which is just 8 times as much as Koban's, 4 monme 6 rin, thus it is called Hachiryoban.
量目は金座の記録に三拾八匁八厘とあり、小判の四匁七分六厘の丁度8倍であることから八両判といわれる。