Size small , I’m a 26” waist and they feel comfortable. Would fit 25”-28” waist comfortably. The back is elastic and the front is flat waist band with pleats. Pockets. Side zip on right side which is unusual, usually it’s on the left side.

Waist laid flat 13”, comfortably stretches to 14”

Inseam 3”

Length from waist to hem 15”

No tags to indicate size or fabric

Best guess on fabric is a sheer matte organza with a poly lining.

I don’t believe these are vintage. Just a cute pair of shorts!