Vintage 40s 50s pastel striped dress -- princess sleeve buying day dress -- purple rainbow dress -- size small

This midcentury dress features princess sleeves and a romantic pastel palette and appears to be handmade of thick cotton fabric. From a family estate of seamstresses, likely circa 1950. Metal side zip. Dress is unlined but fabric is thick. A few very small rust colored stains on bust (see photo 4) and tiny amount of seam stress at back pleat. No tags, looks like a modern size small; but please refer to measurements below.

Measurements (taken with garment laying flat):
bust: 17.5", has darts
waist: 14.25"
hips: 20.5"
length: 40.5" shoulder to hem buying