This is a unique, sexy, vintage "Senorita" style dress.  It could be worn as a costume or as an evening or prom dress.
Three tiers of ruffles are complemented by a crinoline lining.  The front hangs shorter than the back.
Drop shoulder style.
Back 18" zipper.

Very good condition, with the exception of the crinoline lining which has become disconnected from the main dress in several areas.  (This is unnoticeable when worn, but could be easily repaired.)

Tag says Size 14; however, fits more like a modern 8.
Approximate measurements: