BCBG MaxAzria Merino Wool Cardigan black belted

Bcbg MaxAzria Merino wool Cardigan shrug with belt. 3/4 puff Sleeves Color is black. It is marked as Medium but believe to be better for a small size. I am 36 D and its feel too small. I am a Size Medium. Size Small/Medium Measurements approximately laying flat: Pit to pit when c’ose with belt 19" Length from shoulder to hem 23"