red with a white-edged black diagonal band from
the upper hoist side to the lower fly side

Tunisia
red with a white disk in the center bearing a red crescent
nearly encircling a red five-pointed star; the crescent and star are
traditional symbols of Islam

Turkey
red with a vertical white crescent (the closed portion is
toward the hoist side) and white five-pointed star centered just
outside the crescent opening

Turkmenistan
green field with a vertical red stripe near the hoist
side, containing five tribal guls (designs used in producing
carpets) stacked above two crossed olive branches; a white crescent
moon representing Islam with five white stars representing the
regions or welayats of Turkmenistan appear in the upper corner of
the field just to the fly side of the red stripe

Turks and Caicos Islands
blue, with the flag of the UK in the upper
hoist-side quadrant and the colonial shield centered on the outer
half of the flag; the shield is yellow and contains a conch shell,
lobster, and cactus

Tuvalu
light blue with the flag of the UK in the upper hoist-side
quadrant; the outer half of the flag represents a map of the country
with nine yellow five-pointed stars symbolizing the nine islands

Uganda
six equal horizontal bands of black (top), yellow, red,
black, yellow, and red; a white disk is superimposed at the center
and depicts a red-crested crane (the national symbol) facing the
hoist side

Ukraine
two equal horizontal bands of azure (top) and golden yellow
represent grain fields under a blue sky

United Arab Emirates
three equal horizontal bands of green (top),
white, and black with a wider vertical red band on the hoist side

United Kingdom
blue field with the red cross of Saint George (patron
saint of England) edged in white superimposed on the diagonal red
cross of Saint Patrick (patron saint of Ireland), which is
superimposed on the diagonal white cross of Saint Andrew (patron
saint of Scotland); properly known as the Union Flag, but commonly
called the Union Jack; the design and colors (especially the Blue
Ensign) have been the basis for a number of other flags including
other Commonwealth countries and their constituent states or
provinces, and British overseas territories

United States
13 equal horizontal stripes of red (top and bottom)
alternating with white; there is a blue rectangle in the upper