mauve knit maxi dress with back facing deep v-neck

zara new with tags maxi dress in a clingy mauve knit. no care/materials tag but the dress has some stretch and feels like a fine knit poly/elastane blend. deep back-facing v-neck with a long tie, you can play around with which way to wear it. size medium, could fit a large as well with a tighter fit. pit to pit is 19", waist 18", length 51"