Zac Posen Scoop Neck knee length dress

Just purchased from the real real but doesn’t fit. Good price great condition Says size 10 but I would say closer to 6-8 • Blue • Bow Accents • Short Sleeve with Scoop Neck • Exposed Zip Closure at Back Length: 37" Bust: 28" Waist: 27" Hip: 34" Color: Blue Fabric: 82% Viscose, 16% Nylon, 2% Lycra; Lining 90% Nylon, 10% Spandex; Combo 95% Silk, 5% Elastane Clothing Size: L Foreign Size: US 10