These essential shirts can have different fits, depending on the style.
Oversized shirts, for instance, are typically worn baggy and slightly longer. A lot of vintage T-shirts (especially those from the ‘80s and ‘90s) fit this way, roomy enough to layer tight-fitting long-sleeved shirts for a grunge look.
Close-fitted tees, like summer T-shirts, fit more snugly. Typically, the shoulder seam (where the sleeve meets the body of the shirt) should fall at the end of your shoulder, and not below. Unless it’s cropped, the hem of the shirt should generally fall at your hips. Cotton T-shirts should generally hug your body without stretching.