A0x is not a standard paper size. If you meant the A0 paper size in ISO 216, it measures 841 mm by 1189 mm (84.1 cm by 118.9 cm), with a total area of exactly 1 square meter and a constant aspect ratio of √2. If you are asking about a different term “A0x” (for example a cryptocurrency token), please specify which A0x you have in mind and I can provide dimensions or metrics relevant to that context.