Size: about 3.15" Diameter x 2.8" H (3.5" Diameter x 3.48 H with Lid)
Has a capacity of about 4 fl oz.
There is a Kozan Kiln mark on the bottom of each.
About Kozan Kiln「庫山窯（こざんがま）」
http://www.ilmondo-net.com/porcelain/Porcelain.html