Vintage 1960s sundress in blue floral cotton sateen. Fully lined in blue. Piping at the waist. Non-adjustable straps. Back nylon zipper. In excellent condition, there is an old mend next to the zipper in the center back, see last photo. 

No tags. No size tag. No stretch to this fabric.

Bust - 36 inches
Waist - 32 inches
Hips - Free
Length from top of strap to hem - 41 inches