RiyadhSaudi Arabia |
LondonUnited Kingdom |
5 700 000
(2013) |
5 700 000
(2013)
8 416 999
(2013) |
8 416 999
(2013) |
1 554 km2
|
1 554 km2
1 580 km2
|
1 580 km2
|
3 667.95
/km2 |
3 667.95/km2
5 327.21/km2
|
5 327.21
/km2 |