AAC (Autoclaved Aerated Concrete) block sizes in the UAE typically vary from standard sizes, such as 600 x 200 x 100 mm or 600 x 200 x 150 mm. These lightweight yet durable blocks are popular in construction due to their thermal insulation properties and ease of handling. They offer versatility in design and are favored for their eco-friendly and sustainable characteristics in the UAE's building sector.