You're probably most familiar with the 2x4, but that's not the only standard size out there. Other common sizes include 1x3, ...

2x8 Field- sold by the box (7 SF/BX) 4 Neutral Colors: Gloss white, Matte white, Matte warm grey, Matte cool grey. 3 Textures: Smooth, Brick, Raked. Wall and floor applications. In-Stock - Slight ...