This cute little piece could be late 50s to early 60s--it has shoulder pads, which persisted past the 50s. The fabric is a nicely textured hopsacking, possibly silk--fiber content tags weren't much seen at that point. What makes it so special is the bead work on the shawl collar--a combo of faceted silver beads and rhinestones. The manufacturer's tag reads "Future America Frocks by Jenny Morgan." Size wise, I'd say a small to medium--measures 18" down the back and 17" shoulder to shoulder. In the here and now, this would be a great topper for your best skinny jeans.