COS Top Size EUR S US Medium Short Sleeves Stripes Black or Blue Cotton Linen

COS Top Size EUR S US Medium Short Sleeves Stripes Black or Blue Cotton Linen Blend Casual 4.5" Side Slits In good shape! The EUR size is small. I picked US size Medium based on the measurements. It is really hard to tell if this is black or a deep navy blue, but I think it's navy blue. Comes from a smoke-free and pet-free home. 93% Cotton, 7% Spandex. Machine wash, flat dry. Approximate measurements (laying flat): armpit to armpit: 20", length: 24.5"