Here's a comparison of Venus and Earth in terms of radius and mass:

Radius:

* Venus: 6,051.8 kilometers (3,760.4 miles)

* Earth: 6,371 kilometers (3,958.8 miles)

Mass:

* Venus: 4.867 × 10²⁴ kilograms (1.07 × 10²⁵ pounds)

* Earth: 5.972 × 10²⁴ kilograms (1.32 × 10²⁵ pounds)

Comparison:

* Radius: Venus is slightly smaller than Earth, with a radius about 95% of Earth's.

* Mass: Venus is about 81.5% as massive as Earth.

Key Takeaways:

* Similar Size: Venus is remarkably similar in size to Earth, making it sometimes called Earth's "sister planet."

* Lesser Mass: Despite its similar size, Venus has a significantly lower mass than Earth. This difference in mass has significant implications for its gravity and atmosphere.

Note: These figures are approximate, and there is some variation depending on the source and methods used to calculate them.