Madewell Dobby Puff-Sleeve V-Neck Midi Dress in True Black - size tag has been removed - based on measurements I would guess this is a small or medium - reviews on the Madewell website suggest that this item did run large. Please review measurements below to confirm. "Made of a dobby-patterned cotton, this flowy midi dress has an effortlessly put-together look. We love the feminine puff sleeves and the shirring at the waist—and yes, it has pockets too." Preloved in excellent condition minus missing size tag Measurements: Armpit to Armpit: 18" Waist: 18" Length: 44.75" Pet and smoke free home Offers Welcome