Vintage 70s unbranded cherry red blouson secretary day dress, med to Large

Vintage 70s unbranded cherry red midi secretary day dress, size med to large Soft fabric with ample stretch, scooped vee neck and bishop sleeves with decorative bow at elastic waist. No tags but would best fit a medium to large from measurements. Waist stretches comfortable to 18" across. Please use measurements provided in pictures and ask any questions prior to purchase - I want happy customers!