Nearly a tie: Greenland and Saudi Arabia differ by barely 1% in area: about 2,166,086 km² against 2,149,690 km².
Greenland sits in North America, Saudi Arabia in Asia. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 1.01×.
The old map muddied it further: Mercator inflates Greenland about 11.8× and Saudi Arabia about 1.2×, so on a Mercator-style map this pair appears 9.9× apart instead of the true 1.01×.
Saudi Arabia fits 1× into Greenland.
Greenland vs Saudi Arabia: key figures
| Measure | Greenland | Saudi Arabia |
|---|
| True area | 2,166,086 km² · #12 | 2,149,690 km² · #13 |
| Mercator inflation | 11.8× | 1.2× |
| Apparent on Mercator | 25,576,494 km² | 2,579,198 km² |