3 pack lululemon long sleeve (read description)

I'm selling these extremely cheap because I'm not sure of the size. I'm full honestly I bought these from a friend for under shirts, but they are too flowy for me. I was told they were size 8. They are either a style that's meant to be larger and flowy or she was wrong on the size. Selling these 3 as a set. Colors are: dark gray, light gray and black/gray striped.