Twist back A-line halter dress

A-line sundress with twist strap back, soft cups may accommodate up to a C, ruching at waist, side zip with a funky 50’s vibe aqua/purple print, Material is a silky charmeus-y poly with 3% spandex and lined in black poly. Waist measures 13" across with a 38" shoulder to hem. Size 2 but fits more like a size 0. Never worn, no tags.