Here's why:

* Size and Distance from the Sun are Unrelated: The size of a planet and its distance from the sun are not directly related.

* Inner Planets: The inner planets of our solar system (Mercury, Venus, Earth, Mars) are generally smaller than the outer planets (Jupiter, Saturn, Uranus, Neptune).

* Order of Size and Distance: If we list the planets in order of size (smallest to largest), it wouldn't match the order of their distance from the sun.

For example:

* Mercury is the smallest planet in our solar system, but it's the closest to the sun.

* Jupiter is the largest planet, but it's far from the sun.

The arrangement of planets in our solar system is a result of how it formed billions of years ago.