NWT Zara Black Mini Dress with Bejeweled Collar

Short black dress with bejeweled Peter Pan neckline. Dress falling above the knee with shirt collar that is removable with snap buttons. Features short sleeves, back zip fastening, bejewelled appliqué on the neckline and lining. This says it's a size medium but fits like a X-Small from Zara. Best for dress size 4 or maybe size 6. 100% polyester slightly less than 16.5" underarm to underarm, 32.5" length 8 507/16 7854/034/800 medium