A red clay brick is a solid, traditionally rectangular block made from clay fired at high temperatures. Its color ranges from bright red to burnt orange, depending on the type of clay and firing process. The surface can be smooth or slightly rough, with small visible granules. It typically has standard dimensions of approximately 19 cm in length, 9 cm in width, and 5 cm in height, though variations exist. The weight is moderate, and the texture allows good adhesion for mortar. It is widely used in construction due to its strength, reasonable thermal insulation, and rustic aesthetic.