Vintage off-white layering jacket. Open front with pockets on each side. No label/size tag/material tags but feels like a linen-blend and best fits a modern size small.
Underarm to underarm: 19 inches
Shoulder to shoulder: 14.5 inches
Collar to hem: 27 inches
Sleeve: 22.5 inches
Model is 5’10” and typically wears size small/4 for reference.