Please refer to the photos for the measurements**** it is a bit over  5.75" in widest 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 cap canopy with mounting hardware part set - a great part to use to hang your lamp or chandelier; the Canopy has an original gilt finish with patina from age and very intricate ornate design with acanthus leafs relief detailed casting. Good condition - ready to use-  Please see photos, they are part of description; the sale is for one set as shown.