I purchased this at a vintage store and was intending to wear it as a cover up shirt with a white tank (summer look), but never did. It is a size medium but is definitely a slim fit (see pics for measurements). It doesn’t say what material it’s made of , on the shirt…but it feels like a very lightweight cotton/poly blend. *please see pics of the tiny spots on the left front of the shirt. They are barely noticeable but I zoomed in as much as I could to disclose it). Also the hem is slight uneven where the shirt buttons together at the bottom (see pics). But if you’re tucking in or wearing as a cover up it won’t matter as much. Questions? Leave a comment below!