word | | Area - comparative |
| size | Saint Vincent and the Grenadines | twice the size of Washington, DC |
| size | San Marino | about one third times the size of Washington, DC |
| size | Sao Tome and Principe | more than five times the size of Washington, DC |
| size | Saudi Arabia | slightly more than one-fifth the size of the US |
| size | Seychelles | 2.5 times the size of Washington, DC |
| size | Singapore | slightly more than 3.5 times the size of Washington, DC |
| size | Slovakia | about twice the size of New Hampshire |
| size | South Africa | slightly less than twice the size of Texas |
| size | Southern Ocean | slightly more than twice the size of the US |
| size | Spain | slightly more than twice the size of Oregon |
| size | Sudan | slightly more than one-quarter the size of the US |
| size | Switzerland | slightly less than twice the size of New Jersey |
| size | Tanzania | slightly larger than twice the size of California |
| size | Thailand | slightly more than twice the size of Wyoming |
| size | Tokelau | about 17 times the size of The Mall in Washington, DC |
| size | Tonga | four times the size of Washington, DC |
| size | Turks and Caicos Islands | 2.5 times the size of Washington, DC |
| size | Tuvalu | 0.1 times the size of Washington, DC |