These strange looking contraptions are old coffee or tea filter rings. There would have been a fine mesh bag that attached with hooks through the little holes in the ring, which was then hung inside a coffee or tea pot to steep.
This listing is for one (1) enamel ring chosen at random. These three are very close to the same size and have some flexibility/range of fit because of the wider lip that lets it hang over the opening of a coffee or tea pot (see last photo).
SIZE: ranges from 2.125″ inner diameter to 2.625″ inner diameter and 3.25″ outer diameter to 3.5″ outer diameter; nearly 1″ tall
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