Part of my 2009 flag proposal series. SVG files of the flag and its construction sheet are available on request.
Note: My choice of design does not reflect my political views.
The current design
The Union State has no current flag.
First off, this design is unique enough to be distinguishable, yet simple enough to be remembered by a child.
The overall design is reminiscent of the Soviet flag, suggesting continuity and aiding recognition. The red field represents the blood that we all share (suggesting unity) and that has been shed in the past (suggesting a deep history). Red and white are the colours shared between the flags of Belarus and Russia, so these are both present. Also, according to Wikipedia:
The color red has always been positive in the Russian culture. The word red (красный, krasny) is etymologically related with the Russian words for very good and the best, as well as the word for beautiful. This can also be seen in Moscow’s Red Square and the Russian Orthodox festivity, Red Easter.
The individual stars represent the people and progress. The white colour represents the snow, purity and peace, and the gold/yellow colour represents prosperity and vitality.
With the current membership, the interpretation is “two stars, two states”. The white star represents Belarus in the west (the name means “White Russia”) and the golden star represents Russia in the east (from the Soviet flag). There is also a more general “two stars, two continents” interpretation, where one star represents Europe and the other represents Asia. Regardless of the interpretation, the red field around the stars links them together, and suggests room and welcome for others.
The two stars are in the canton (top left corner) to ensure importance. When a flag wears out, the left hand side will be the part remaining. When it is not flying, this corner is the most visible region of the flag. When it is flying, the eye is naturally attracted to this region as a starting point since the Cyrillic writing system goes from left to right and top to bottom.