| Country | Flag description |
| Belgium | three equal vertical bands of black (hoist side), yellow, and red note: the design was based on the flag of France |
| Belize | blue with a narrow red stripe along the top and the bottom edges; centered is a large white disk bearing the coat of arms; the coat of arms features a shield flanked by two workers in front of a mahogany tree with the related motto SUB UMBRA FLOREO (I Flourish in the Shade) on a scroll at the bottom, all encircled by a green garland |
| Benin | two equal horizontal bands of yellow (top) and red (bottom) with a vertical green band on the hoist side |
| Bermuda | red, with the flag of the UK in the upper hoist-side quadrant and the Bermudian coat of arms (white and green shield with a red lion holding a scrolled shield showing the sinking of the ship Sea Venture off Bermuda in 1609) centered on the outer half of the flag |
| Bhutan | divided diagonally from the lower hoist-side corner; the upper triangle is yellow and the lower triangle is orange; centered along the dividing line is a large black and white dragon facing away from the hoist side |
| Bolivia | three equal horizontal bands of red (top), yellow, and green with the coat of arms centered on the yellow band note: similar to the flag of Ghana, which has a large black five-pointed star centered in the yellow band |
| Bosnia and Herzegovina | a wide medium blue vertical band on the fly side with a yellow isosceles triangle abutting the band and the top of the flag; the remainder of the flag is medium blue with seven full five-pointed white stars and two half stars top and bottom along the hypotenuse of the triangle |
| Botswana | light blue with a horizontal white-edged black stripe in the center |
| Bouvet Island | the flag of Norway is used |
| Brazil | green with a large yellow diamond in the center bearing a blue celestial globe with 27 white five-pointed stars (one for each state and the Federal District) arranged in the same pattern as the night sky over Brazil; the globe has a white equatorial band with the motto ORDEM E PROGRESSO (Order and Progress) |
| British Indian Ocean Territory | white with six blue wavy horizontal stripes; the flag of the UK is in the upper hoist-side quadrant; the striped section bears a palm tree and yellow crown centered on the outer half of the flag |
| British Virgin Islands | blue, with the flag of the UK in the upper hoist-side quadrant and the Virgin Islander coat of arms centered in the outer half of the flag; the coat of arms depicts a woman flanked on either side by a vertical column of six oil lamps above a scroll bearing the Latin word VIGILATE (Be Watchful) |
| Brunei | yellow with two diagonal bands of white (top, almost double width) and black starting from the upper hoist side; the national emblem in red is superimposed at the center; the emblem includes a swallow-tailed flag on top of a winged column within an upturned crescent above a scroll and flanked by two upraised hands |
| Bulgaria | three equal horizontal bands of white (top), green, and red note: the national emblem, formerly on the hoist side of the white stripe, has been removed |
| Burkina Faso | two equal horizontal bands of red (top) and green with a yellow five-pointed star in the center note: uses the popular pan-African colors of Ethiopia |
| Burma | red with a blue rectangle in the upper hoist-side corner bearing 14, white, five-pointed stars encircling a cogwheel containing a stalk of rice; the 14 stars represent the seven administrative divisions and seven states |
| Burundi | divided by a white diagonal cross into red panels (top and bottom) and green panels (hoist side and fly side) with a white disk superimposed at the center bearing three red six-pointed stars outlined in green arranged in a triangular design (one star above, two stars below) |
| Cambodia | three horizontal bands of blue (top), red (double width), and blue with a white three-towered temple representing Angkor Wat outlined in black in the center of the red band note: only national flag to incorporate an actual building in its design |
| Cameroon | three equal vertical bands of green (hoist side), red, and yellow with a yellow five-pointed star centered in the red band note: uses the popular pan-African colors of Ethiopia |
| Canada | two vertical bands of red (hoist and fly side, half width), with white square between them; an 11-pointed red maple leaf is centered in the white square; the official colors of Canada are red and white |
| Cape Verde | five unequal horizontal bands; the top-most band of blue - equal to one half the width of the flag - is followed by three bands of white, red, and white, each equal to 1/12 of the width, and a bottom stripe of blue equal to one quarter of the flag width; a circle of 10, yellow, five-pointed stars, each representing one of the islands, is centered on the red stripe and positioned 3/8 of the length of the flag from the hoist side |