1970s Purple Midi Dress with Sheer Sleeves, Size M/L

Description - Easy knit dress with sheer balloon sleeves. It pulls over your head.  There are no closures. The skirt has pressed decorative pleats. I'm 5'6" and this is midi length on me.

Details

Brand - Unknown, no tags present

Content - feels like Polyester or a poly blend

Size - M/L

Shoulders - 17.25"

Chest - 21" pit to pit 

Waist - 12" across, stretches to 19"

Hips - open

Length - 43.5"; 17" bodice, 26.5" skirt

Sleeves - 21"

Condition - I didn't find any flaws