Lululemon 3/4 length shirt - gray & black

Lululemon 3/4 length shirt - gray & black I believe this is a size 4 or 6 but can’t find the size dot. The material has some stretch, super comfy. Worn a few times, I also am not sure what style this shirt is. Happy to measure for serious buyers. I also have the same shirt (and size) in lighter gray and citron. No trades. Thank you!