Bosnia and Herzegovina
total: 1,538 km
border countries: Croatia 932 km, Montenegro 249 km, Serbia 357 km
Botswana
total: 4,013 km
border countries: Namibia 1,360 km, South Africa 1,840 km, Zimbabwe
813 km
Bouvet Island
0 km
Brazil
total: 16,885 km
border countries: Argentina 1,261 km, Bolivia 3,423 km, Colombia
1,644 km, French Guiana 730 km, Guyana 1,606 km, Paraguay 1,365 km,
Peru 2,995 km, Suriname 593 km, Uruguay 1,068 km, Venezuela 2,200 km
British Indian Ocean Territory
0 km
British Virgin Islands
0 km
Brunei
total: 381 km
border countries: Malaysia 381 km
Bulgaria
total: 1,808 km
border countries: Greece 494 km, Macedonia 148 km, Romania 608 km,
Serbia 318 km, Turkey 240 km
Burkina Faso
total: 3,193 km
border countries: Benin 306 km, Cote d'Ivoire 584 km, Ghana 549 km,
Mali 1,000 km, Niger 628 km, Togo 126 km
Burma
total: 5,876 km
border countries: Bangladesh 193 km, China 2,185 km, India 1,463 km,
Laos 235 km, Thailand 1,800 km