Italian unisex T-shirt, medium lavender

This tee was purchased in Italy, hence the euro price tag. I bought it for my husband but didn’t realize the sizing was so different. It is 23” pit to pit which fits more like a large. The mark is a deodorant streak from trying it on. It should wash out. Because of the tags,I didn’t try washing the shirt. If it had fit,I would have worn it myself. It is unisex.