The Earth’s circumference varies slightly depending on where it is measured due to its slightly flattened shape (an oblate spheroid).

• Equatorial circumference (around the equator): approximately 24,901 miles (40,075 kilometers).
• Polar circumference (measured passing through the North and South Poles): approximately 24,860 miles (40,008 kilometers).

This means the Earth is about 41 miles wider around the equator than it is around the poles