No (King) Tut-ing about it, this is a splendid old set, probably c. 1970s, composed of metal and faux leather.
Necklace measures approx. 17" around the inside and attaches with a clasp at the back. Center portion is just about 1 1/2" at its longest point. The pierced earrings are 1 1/2" long. Bracelet has an inside opening of 2 1/4" .
The metal is brass and there's perhaps a modicum of wear to it, though certainly nothing that detracts from the vintage/Deco/retro feel of this fab old set. I would deem it to be in extremely good to excellent vintage condition.