Suehiro Two Sided SMALL Sharpening Stone with rubber base -

www.japanny.com..., a Japanese waterstone manufacturer from Niigita province in Japan, has a long history of producing high quality, yet affordable ‘toishi’ (sharpening stones). For many years now, they have produced an outstanding range of sharpening stones and continue to produce them today.
Quality is of utmost importance to Suehiro and that is made evident in his sharpening stones. A stone bought from them 30 years ago performs in the same way when used today. In Japan, you will likely see Suehiro sharpening stones almost everywhere; from department stores, home centers, and fine cutlery dealers.

[@ared18t]

I like the small Stone though it's so much fun to use hehe