Tina Scotland Pink Cashmere Short Sleeve Sweater w V neck in Sz Medium?

Vintage Tina Scottish Cashmere sweater. Short sleeves with a v neck line. Light pink with a pretty design to it. In nice shape. The size tag is no where to be located on the sweater so please review the measurements. We believe it is a medium. Measures as follows laid out, Length is about 20" Long Sleeves 7" long Armpit to Armpit it is about 18 for a bust size of 36"