South Georgia and the South Sandwich Islands:
the flag of the UK is
used

Spain:
three horizontal bands of red (top), yellow (double width),
and red with the national coat of arms on the hoist side of the
yellow band; the coat of arms includes the royal seal framed by the
Pillars of Hercules, which are the two promontories (Gibraltar and
Ceuta) on either side of the eastern end of the Strait of Gibraltar

Sri Lanka:
yellow with two panels; the smaller hoist-side panel has
two equal vertical bands of green (hoist side) and orange; the other
panel is a large dark red rectangle with a yellow lion holding a
sword, and there is a yellow bo leaf in each corner; the yellow
field appears as a border that goes around the entire flag and
extends between the two panels

Sudan:
three equal horizontal bands of red (top), white, and black
with a green isosceles triangle based on the hoist side

Suriname:
five horizontal bands of green (top, double width), white,
red (quadruple width), white, and green (double width); there is a
large, yellow, five-pointed star centered in the red band

Svalbard:
the flag of Norway is used

Swaziland:
three horizontal bands of blue (top), red (triple width),
and blue; the red band is edged in yellow; centered in the red band
is a large black and white shield covering two spears and a staff
decorated with feather tassels, all placed horizontally

Sweden:
blue with a yellow cross that extends to the edges of the
flag; the vertical part of the cross is shifted to the hoist side in
the style of the Dannebrog (Danish flag)

Switzerland:
red square with a bold, equilateral white cross in the
center that does not extend to the edges of the flag

Syria:
three equal horizontal bands of red (top), white, and black,
with two small green five-pointed stars in a horizontal line
centered in the white band; similar to the flag of Yemen, which has
a plain white band, and of Iraq, which has three green stars (plus
an Arabic inscription) in a horizontal line centered in the white
band; also similar to the flag of Egypt, which has a heraldic eagle
centered in the white band

Tajikistan:
three horizontal stripes of red (top), a wider stripe of
white, and green; a gold crown surmounted by seven gold,
five-pointed stars is located in the center of the white stripe

Tanzania:
divided diagonally by a yellow-edged black ba