the answer is Venus, and Earth
See related link for a full pictorial.
Of the known planets, Venus is closest in size to the Earth.
Earth rates third of the planets because of its thrid place in size.
Venus and Earth
venus
Venus and Earth are often referred to as sister planets because they are similar in size and composition. They are both terrestrial planets with solid surfaces and are situated relatively close to each other in the solar system.
Us & Venus. Gotta love those Venusians.
Venus and Earth. They are often called brother planets.
Mercury and Venus are the most similar in size, with Venus being just slightly larger. Both planets are also relatively close to each other in distance from the Sun, with Venus being the second planet from the Sun and Mercury being the first.
Mercury and Venus :)
Earth and Venus