This is a face plate cover for the overflow hole of a clawfoot or other freestanding bathtub.
This item listed here is sold by itself, and only includes the faceplate, and attachment screw. The attachment screw has a built-in loop for attaching the stopper chain.
This drain overflow faceplate measures 3" inches in diameter, so should be able to fit most all applications.
Available in your choice of finishes.
(FYI: With all finish choices below, the loop ring portion of the screw is silver in finish.)