Please refer to the photos for the measurements****Measures about 5.25" in diameter, the ornate chain Measures about 12.5" long. (if a longer chain is needed- just let me know). Vintage heavy solid cast brass /bronze ceiling canopy with mounting hardware part set  with dark patina- a great part to use to hang your lamp or chandelier; the Canopy has a  nice finish with old patina  look and very intricate ornate relief detailed casting. Good condition  - as shown - ready to use-  Please see photos, they are part of description.