San Marino total: 39 km border countries: Italy 39 km
Sao Tome and Principe
0 km
Saudi Arabia
total: 4,431 km
border countries: Iraq 814 km, Jordan 744 km, Kuwait 222 km, Oman
676 km, Qatar 60 km, UAE 457 km, Yemen 1,458 km
Senegal
total: 2,640 km
border countries: The Gambia 740 km, Guinea 330 km, Guinea-Bissau
338 km, Mali 419 km, Mauritania 813 km
Serbia and Montenegro
total: 2,246 km
border countries: Albania 287 km, Bosnia and Herzegovina 527 km,
Bulgaria 318 km, Croatia (north) 241 km, Croatia (south) 25 km,
Hungary 151 km, Macedonia 221 km, Romania 476 km
Seychelles
0 km
Sierra Leone total: 958 km border countries: Guinea 652 km, Liberia 306 km
Singapore
0 km
Slovakia
total: 1,524 km
border countries: Austria 91 km, Czech Republic 215 km, Hungary 677
km, Poland 444 km, Ukraine 97 km
Slovenia
total: 1,334 km
border countries: Austria 330 km, Croatia 670 km, Italy 232 km,
Hungary 102 km