How does China compare with South Korea?
China measures 4,822 km (2,996 mi) east to west, and South Korea measures 601.6 km (373.8 mi) north to south. China comes to 8.02 times the measured size of South Korea, a difference of 4,221 km (2,623 mi). The two are not judged on the same axis: China is quoted as an east-west span and South Korea as a north-south span, so the honest statement is one figure against the other, 12% of it, and not one outline against another. China is written in thousands of kilometres and South Korea in hundreds of kilometres, a whole band of scale apart.
| Object | Real size | Axis measured | What the figure covers |
|---|---|---|---|
| China | 4,822 km 2,996 mi |
East-west span | Widest extent of the outline on that axis |
| South Korea | 601.6 km 373.8 mi |
North-south span | Widest extent of the outline on that axis |
Both figures, China and South Korea, come from the Size It Up measurement set, one real-world size and one measured axis per object, last checked in September 2026; outline provenance is listed on the sources page.
Why this one is hard to judge by eye
China has never been measured, only stated: the figure comes from its source and moves when the source is redrawn, while South Korea can be checked with a tape, so this pair sets a decision against a measurement. China is drawn about 8.70 times as wide as South Korea as well as 8.02 times its measured size, so the area it takes in the frame grows faster than the figure anyone quotes. The outline of China that most people carry comes from a world map, and every projection that keeps angles true stretches whatever sits far from the equator; the outline of South Korea above is scaled from measured distances instead.
What each figure covers
China. China is judged east to west, a span that officially runs on a single clock. The real difference in solar time across it is close to four hours.
South Korea. South Korea is measured north to south. The span is shorter than most people expect for a country of that population.
China is quoted as an east-west span and South Korea as a north-south span: two conventions, so the ratio compares the two numbers rather than the two objects.
What else is about that size?
Measured the same way, China at 4,822 km sits within a tenth of Mercury at 4,879 km and Indonesia at 5,049 km. South Korea at 601.6 km has Portugal at 576.5 km, Minnesota at 655.8 km and Uruguay at 541.9 km for company, within a tenth. Swapping any of those in for China would move its ratio to South Korea by less than 10%.