The dimensions and sizes of aluminum profiles can vary greatly depending on their intended use and design. They can range from small and narrow profiles, such as 10mm x 10mm square tubes, to larger and wider profiles, such as 100mm x 100mm square tubes. Additionally, aluminum profiles can come in various shapes, including square, rectangular, round, and custom shapes, to accommodate different applications and structural requirements. It is important to consult specific product catalogs or manufacturers for precise dimensions and sizes of aluminum profiles.