In Saudi Arabia, common red bricks measure about 23 x 11 x 5.5 cm, while small red blocks are often 20 x 10 x 5 cm or 20 x 10 x 6.5 cm. Sizes may vary slightly by manufacturer, so review the product card and Saudi specifications before buying to keep walls even.
For a red brick wall using 23 x 11 cm bricks with 1 cm mortar joints, you usually need about 35 bricks per square meter. Small red blocks at 20 x 10 cm need about 43 pieces per square meter, with a little extra for mortar and cutting waste.
Small red blocks work well for internal partitions and can be used externally if they have low water absorption and meet Saudi specifications. In hot, humid coastal areas, use proper mortar, surface coating, and ventilation to reduce moisture, heat stress, and finish movement.
Red brick is smaller and denser, often used for load-bearing walls or areas needing higher durability. Red block is larger and lighter, which speeds up walling and reduces mortar use. Choose based on load requirements, project specifications, and the finish needed for your building.
Select a brand with consistent sizes, clean edges, and a uniform surface, then confirm it matches Saudi specifications. Matkel offers clear product details that help you compare quality. Avoid cracked or uneven pieces, as they can weaken mortar bonding and increase the chance of wall cracking.