Zenica's flag's background is of same yellow and light green color as CoA has (there is also a variant with background of white color). Width vs length relationship is 1:2 (for white 3:7). Flag needs not to be used vertically positioned in all its variants. At the middle part there is uncolored coat of arms (only contours); in the white variant CoA is colored. The width of the coat of arms occupies around of the horizontal i.e. of the width of the vertical flag, and in the variant with white background the height of the coat of arms occupies of the vertical flag height.