Girls Boho Bling Summer Halter Dress

From expensive Vintage stock, obtained from family with 4 girls who had nice clothes. Fine white linen feel material, (there are no tags) Fancy embroidery design with silver sequins, tie straps and a loop, I’m not sure how this is used. I just tied strap around hanger for pictures No flaws, good condition. Recommend hand wash. Measurements in last picture.