Vintage 1960s dress

Excellent 1960s vintage condition, consistent with age, high quality fabrics, no brand, tag labeled I.F.D. with 3 sizes that may represent 3 different European sizes? I purchased on Etsy from a seller in Norway for $75 plus shipping. I never had the opportunity to wear it and became too small for me. Vintage sizing - See measurements below. No material tag. Red print material feels like cotton wool blend and solid cream material feels like cotton with a linen texture. I’m sensitive to various scents in fabrics and this dress has nothing. Last 4 photos show a couple of loosened threads in the seam under right sleeve, wear to inside lining back of dress by neckline, and slight texture differentiation on left pocket next to button (appears to be nature of fabric vs damage). 20% off 2+ bundled listings Approximately 19.5” pit to pit flat, 36” length. I estimate medium sizing.