J Crew Women’s Floral One Button Large Blazer

J Crew Women’s Floral One Button Large Blazer. Fully lined. Material is cotton. Actual size and material label is missing, however please see measurements. It's a little big on me and I weigh 144lbs with fairy big arms, but small bust. This might be a size Medium based on the measurements.  Approximate Measurements: Flat Lay Pit to Pit-21" Length-25" Shoulder-17" Pit to Cuff-19" Back slit-7"