The Boston city flag consists of a sky blue field and the seal of the city of Boston in the center. The flag is sometimes flown in a darker shade of blue, more of a turquoise.
The flag was proposed by the Columbus Day Committee in 1913, but it was not adopted until 1917.
The code specifies that the flag is to be flown at City Hall and at the Common. It is also flown at private locations throughout the city, as most cities fly their flags more frequently than, say, a smaller town.
Most mass-produced flags are commonly 150x90cm / 5x3' or 90x60cm / 3x2', which will often vary from the official size ratio. We now offer a custom-manufactured official size option for our many of our flags.