This page presents facts about circumference of known objects. Here you can find circumference of the Earth, circumference of the Sun, circumference of various sport balls, baby head circumference etc.
| Circumference of the Earth (at the equator) | 24901 mi (40075 km) |
| Circumference of the Earth (at the poles) | 24860 mi (40008 km) |
| Circumference of the Sun | 2713406 mi (4366813 km) |
| Circumference of the Venus (at the equator) | 23627 mi (38025 km) |
| Circumference of the Mercury (at the equator) | 9525 mi (15329 km) |
| Circumference of the Mars (at the equator) | 13300 mi (21343 km) |
| Circumference of the Mars (at the poles) | 13200 mi (21244 km) |
| Circumference of the Saturn (at the equator) | 235298 mi (378675 km) |
| Circumference of the Jupiter (at the equator) | 272946 mi (439263 km) |
| Circumference of the Moon (at the equator) | 6783 mi (10916 km) |
| Circumference of the ball in basketball (men's games) | 30 in (76 cm) |
| Circumference of the ball in basketball (women's games) | 29 in (74 cm) |
| Circumference of the ball in football | 27 – 28 in (68 – 70 cm) |
| Circumference of the ball in American football | 28 in (71.12 cm) on the long side, 21 in (53.34 cm) on the short side |
| Circumference of the golf ball | 5.28 in (13.41 cm) |
| Circumference of the tennis ball | 8.258 (21 cm) |
| Baby head circumference (boy at birth) | 14 in (35.6 cm) |
| Baby head circumference (girl at birth) | 13 in (33 cm) |
