China 18th century
Kangxi period (1661-1722)
For the octagonal one:
Length: 10.8cm
For the other two, trapezoidal:
Length of the long side: 6cm
Length of the short side: 12cm
Good general condition, wear of the enamel in places, one of the two smallest has a tiny chip.
More photos (many available) and information on request.