This is a beautiful vintage dress probably made in the 60s but with a totally 40s look. It is hard to say her age actually, the dress is completely hand-made, the hems are hand-sewn, and the zipper is hand-sewn. The fabric feels like cold rayon but I would bet it is synthetic. Metal side zipper.
Measures - Please make sure you double-check your own measures and compare them to the ones below.
Shoulders seam to seam: -
Armpit to armpit: 18" (46cm)
Waist: 26" (66cm)
Shoulder to waist: 17" (43cm)
Waist to bottom: 24" (60cm)
Length: 41" (103cm)
Fabric: Cold rayon? Synthetic? metal zipper
Condition: Great condition with some yellowish spots close to the waist and a couple at the very bottom (view photos). No holes or other issues.