White One-Button Blazer with Peplum and Puffed Sleeves

White one-button lightweight blazer with peplum and puffed sleeves. Brand is Diacacy - no brand label on garment. Size label reads S which matches the size chart, but actually fits more like an L. See photos and measurements below: Measurements taken flat: Bust: 19" Waist: 16" Sleeve length: 24" Gently used.