Vintage Black Button-front Maxi Dress

Vintage black maxi dress with monochrome floral motif from Ross Platos. Padded shoulders and hip pockets. Full button front. Plunging v-neck. Tagging this as an XXS or size 0. Model is 5’7” 135lbs and typical wears a size 2. I am sucking in extremely to button this at the waist. Measures to be 18” flat across from pit to pit, 12”flat across the smallest part of the waist (no elastic), and 59” long from shoulder to hem. Excellent vintage condition.