So adorable and comfortable. While these are oversized and ultra flattering they are true to size elbow down through arms and through shoulders. They fit exactly as they appear on model. The material for bust flows elbow to elbow so no true bust measurement can be given. Sticking with your normal sizing should be fine. I modeled a small & Im 2/4 and arms are fitted on me. 98% Polyester 4% Spandex. Length on Sides S 30” M 31” L 32” Length on Front S 26” M 27” L 28”