Vintage 60’s Lavender Lilac Maxi Dress

This vintage dress is in excellent condition. The fabric may be silk shantung, but I’m not sure. There is no size tag or fabric tag in the dress. It is likely handmade given the one tag that is sewn in. There is interesting iridescent trim on the bodice. It feels like plastic, and I have no idea if it’s sewn on, glued on, or both. The dress is completely lined as well. I don’t know what size it is exactly, but given the measurements, my guess is small. Approximate Measurements: Chest 16” Waist 13 1/2” Length 55”