The size of a granite block can vary depending on the quarry and the intended use. Typically, granite blocks can range in size from a few feet to several yards in length and height, and can weigh several tons. Some common sizes for granite blocks used in construction projects range from 2 to 3 meters in length, 1 to 1.5 meters in height, and 1 to 1.5 meters in width. However, specific sizes may vary depending on the quarry and customer requirements.