Which planet is the smallest of the inner planets in our solar system?

Mercury is the smallest of the inner planets in our solar system. Its diameter is about 4,880 kilometers, making it significantly smaller than Venus, Mars, and Earth. Mercury's small size is one of its defining characteristics, and it is located closest to the Sun, which also contributes to its unique conditions, such as extreme temperature variations and a lack of substantial atmosphere.

Venus, Mars, and Earth are larger than Mercury, with Earth being the largest of the four inner planets. Venus and Earth are similar in size, with Venus being slightly smaller, while Mars is larger than Mercury but still smaller than Earth and Venus. This size hierarchy helps in classifying the planets and understanding their physical characteristics in relation to one another.