Standard-size bricks may vary in which characteristic?

Bricks are typically standardized in their dimensions to ensure consistency in construction. However, the height of standard-size bricks can vary based on different regional specifications, manufacturing practices, or design applications. While the industry often adheres to certain standard sizes for bricks, the height can have variations that accommodate specific architectural requirements or preferences.

The other characteristics such as length, finishing, and color typically have strict standards or classifications tied to manufacturing practices. Length may have standard measures, and finishing refers to surface texture, which can be controlled more uniformly. Color is often a result of the raw materials and firing processes used, but different batches can still produce slight variations. Therefore, height stands out as a characteristic that can differ across various types of standard bricks.