These dresses are becoming rarer to find and this is a wonderful example of the work from the International Ladies Garment Workers Union. If I began a history lesson here it would say so much more about the reason dresses like this came about. However, I'm sure you're more interested in the actual dress information. You will though, be getting a small and valuable piece of history to be cherished.
Dating from the 1960s this is a cool mod style dress in a fit and flare design. The fabric is a polyester blend and it's durability has seen it come through the decades with it's colour as bright as it was 70 years ago.
The top of the dress is stretch ribbing. The neck and sleeve cuffs have a white band with red stripe and this is replicated at the waist. The wide A line skirt also has an element of stretch and the hem of the skirt has a blanket stich in white along it's edge that could almost be hand finished.

Underarm to underarm 13" / 33cm with a large degree of stretch so up to approx 36" / 92cm bust
Waist 12" / 31cm stretches to 14.5" / 36.5cm up to approx 28" / 71cm waist
Hip 15" / 38.5cm stretches to 17" / 43.5cm approx up to 34" / 86cm hip
Back of neck to hem 34.5" / 87.5cm

Please take a look at my other vintage treasures

Vintage 1960s Little Red Dress from ILGWU S