Adidas Crop Top (PLEASE READ DESCRIPTION)

I loved this top SO much until my back and shoulders grew from strength training. I am a 34B and it was comfortable until I grew from training. Adidas manufactured as a small, which I usually am. However, it was fairly tight around my armpits, and once I grew, my shoulders and arms no longer fit. This being said, I am listing as X SMALL due to the fact that I think it should be advertised as smaller than what the tag says :) If you have any questions, feel free to ask!