Question: are all city blocks the same size?
Answer: The standard block in Manhattan is about 264 by 900 feet (80 m × 274 m). In Chicago, a typical city block is 660 by 330 feet (200 m × 100 m) (w × h), meaning that 16 east-west blocks or 8 north-south blocks measure one mile, which has been adopted by other US cities.