watercolor puff sleeve top

This is a vintage fall colored (red, orange, yellow, brown top by the brand Sere Nade New York. It is unfortunately too big on me, but I was drawn to the coloring, watercolor style, puff sleeves, and the vertical ruched cinch detailing. It looks so good tucked in for work! The tag size is a XL and fits a M-XL. Pit to pit is 15". The length is 24". The sleeve end holes are 6 1/2" across. The material is 100% polyester. Im modeling and am 5' 3", weight 104, and usually wear size Sma