Vintage 70s Delicate Sheer Ivory Dress - remnant of a small tag at inside neckline, it is under the stitches 
Sheer crinkle material.  Poof shoulder long sleeves have two buttons.  Elastic waist. Hand gentle wash, material is likely polyester/cotton - Thin, sheer and light.  
Dress measures: approx 32" bust (16" underarm to underarm with material relaxed/unstretched - I imagine 34" would be stretched measurement), 19-28" waist, 32-34" hips, 15" shoulders, 15" bodice length, 27" sleeve, 40" total length. 
Great clean condition!  Flaws: yellow speck on front bodice - see closeup where front buttons are visible.  rust color specks on back neck - see closeup of back neck ruffle.