I would call this a lightweight “Sweater” instead of a “T-Shirt” because it is similar to a “knitted” style, rather than T-Shirt material. I like the style of this sweater because the white lines around the collar and ends of the sleeves are very crisp and clean. I usually wear a Medium in shirt and sweater sizes, but I purchased a Small, which fits perfectly. The only thing that could be changed a bit is the sleeves. I have “normal sized” arms and wrists, but I find that the design of the sleeves is a little bit large, so I am going to have the sleeves altered a little, so they are a little tighter.