The semi-major axis of Saturn's orbit about the sun is 9.5 Astronomical Units (A.U.) or roughly 1.4 billion km.
The planet (without rings) has a diameter of roughly 75,000 miles (120,000 km) at the equator.
This Hubble image was created from HST data from proposal 9354: E. Karkoschka and M. Tomasko (University of Arizona)
F439W (B), F502N ([O III]), F550W (V), F658N (H-alpha)
NASA, ESA and E. Karkoschka (University of Arizona)
Blue: F439W (B)
Cyan: F502N ([O III])
Green: F550W (V)
Red: F658N (H-alpha)