Ivory linen canvas fabric, collared neckline with chest flap pockets (still stay stitched closed), 3/4 sleeves with notched cuffs; fully lined, curved side hemline, four button closure. Lining fabric not on label, likely acetate or polyester.
Mannequin is 36/28/34" for fit reference
One faint stain on right pocket flap, no other rips tears or stains

Tag size of 38 European (Size 6 US per retailer website), actual measurements
bust: 36"
waist: 34"
hip: 38"
sleeve: 21"
back length: 21"
shoulder: 16"

This item is sold from an excellent, highly rated vintage boutique in El Cajon, CA.