Bassas da India:
the flag of France is used

Belarus:
red horizontal band (top) and green horizontal band
one-half the width of the red band; a white vertical stripe on the
hoist side bears the Belarusian national ornament in red

Belgium:
three equal vertical bands of black (hoist side), yellow,
and red; 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 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; 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