Pattern: The distinctive feature of a plaid shirt is its pattern, which consists of intersecting lines in different colors. The pattern can vary widely, with different colors and sizes of checks or tartan-style designs.

Colors: Plaid shirts can come in a wide range of color combinations. Classic plaid patterns may incorporate colors like red, green, blue, yellow, black, or white, but modern variations can include almost any color combination.

Fabric: Plaid shirts are available in different fabrics, including cotton, flannel, polyester, or blends. Flannel plaid shirts, in particular, are popular during colder seasons due to their softness and warmth.

Style: Plaid shirts are versatile and can be found in various styles, such as button-up shirts with long sleeves, short sleeves, or even sleeveless versions.