1.392 X 106 Km is the equatorial diameter. There is a slight 'flattening' of the polar diameter dues to the suns rotation.
over 7 miles
5- 10 miles
The Earth has a diameter of 12742km on average.
Venus is closest to the Earth in terms of width (diameter). Its mean diameter is 12103km, while Earths is 12742km. Venus' diameter is therefore around 95% of Earths.