Here is an adorable short sleeve dress by Kay Windsor. Feels like mostly or all polyester. Lush red fabric with raised wave pattern throughout. 21" zipper down the back, and a sweet built in half tie with buttons. Timeless shape and a gorgeous color on this one. Medium weight but slightly sheer. It's in amazing shape and has years of life left. The tag says size 14, but here are the exact measurements. (be sure to reference the last photo to see how I measure dresses)

Here are the measurements laying flat:

Bust 19"
Waist 17"
Hips 19"
Sleeve 7"
Length 39"

This item is sold from a vintage boutique in Roanoke, VA.