Planets & moons by size
16 things ranked from the Sun at 1,392,700 km down to Ceres at 939 km — a spread of 1,483×.
| Thing | Size | In feet | vs the largest |
|---|---|---|---|
| The Sun | 1,392,700 km | 4,569,225,722 ft | — |
| Jupiter | 142,984 km | 469,107,612 ft | 10.3% |
| Saturn | 120,536 km | 395,459,318 ft | 8.7% |
| Uranus | 51,118 km | 167,709,974 ft | 3.7% |
| Neptune | 49,528 km | 162,493,438 ft | 3.6% |
| Earth | 12,742 km | 41,804,462 ft | 0.9% |
| Venus | 12,104 km | 39,709,974 ft | 0.9% |
| Mars | 6,779 km | 22,240,814 ft | 0.5% |
| Ganymede | 5,268 km | 17,284,121 ft | 0.4% |
| Titan | 5,149 km | 16,894,357 ft | 0.4% |
| Mercury | 4,879 km | 16,008,530 ft | 0.4% |
| Io | 3,643 km | 11,952,756 ft | 0.3% |
| The Moon | 3,475 km | 11,400,262 ft | 0.2% |
| Europa | 3,122 km | 10,241,470 ft | 0.2% |
| Pluto | 2,377 km | 7,797,244 ft | 0.2% |
| Ceres | 939 km | 3,082,021 ft | 0.1% |
How the sizes are taken. Each figure says what it measures — height, length, diameter or elevation — and for which individual or convention. Everything is drawn standing upright on one baseline so a single scale holds, including things that are long rather than tall. Values come from the linked Wikipedia article for each item.
About this list
The 16 entries are a curated selection rather than a complete census, chosen so that sizes spread across a wide range. The Sun sets the top of the scale here at 1,392,700 km; Ceres sets the bottom at 939 km.
Each figure states what it measures and links to its source. Where a thing could be measured two ways, the page names which one it uses.
Read the rest — 3 more sections
How the spread looks
The 16 planets & moons here run from 939 km to 1,392,700 km. The middle entry, Ganymede, is 5,268 km, which is 0% of the largest. 2 of the 16 are at least a tenth of the size of the Sun, so 14 of them fall more than ten times smaller than the leader.
The widest jump between neighbours in the ranking is from the Sun (1,392,700 km) down to Jupiter (142,984 km), a step of 9.74×. Gaps like this are where a size chart is most useful, because the two things on either side look like different kinds of object.
The largest and the smallest
The three largest are the Sun (1,392,700 km), Jupiter (142,984 km), Saturn (120,536 km). The three smallest are Ceres (939 km), Pluto (2,377 km), Europa (3,122 km).
For a sense of human scale, an adult of 1.7 m stands at 0% of the largest entry and below the smallest.
How sizes in this group are measured
Worlds are listed by diameter. Gas giants are not round, so equatorial diameter is used for them and mean diameter for the rest. All figures are rounded from published mission data.
Open any row to see its own page, which names the measurement, the basis and the Wikipedia article used, and compares it with the things nearest to it in size.