25 inches in circumference would be the largest normal (not  hydrocephalic) head.    The world record holder is Rick Walters.
Trending Now. Answers. Best Answer: 365 days, 5 hours, 49 minutes and 1.20 seconds (or 365.242375 days). The distance is not so easy; the Earth doesn't travel in a circle through space. With relation to the Sun, it does, but since the Sun is moving, the Earth moves in a helixal orbit.
The total circumference of Earth's orbit is a little over 584 million miles. Although an Earth day is equal to 24 hours, the planet actually completes a rotation around its axis, which is known as a sidereal orbit period, once every 23 hours, 56 minutes and 4.09 seconds.