I could have purchased one size up but it's well shaped, it's kind of itchy, not the most comfortable sweater I've bought. But I can use it in a lot of ways and the fabric and cut are great quality.
The shirt is thinner than I expected it to be, and it runs a tiny bit small. It's very comfortable, and not itchy. However, it is a bit frayed around the wrists. I'm not sure if this is intentional or not.