Emblems of the International Red Cross and Red Crescent Movement Crescent Movement that the shape of the cross should be a cross composed of five squares. However, regardless of the shape, any Red Cross on white background should be valid and must be recognized as a protection symbol in conflict. Of the 190 National Societies which are currently recognized by the ICRC, 154 are using the Red Cross as their official organization emblem. According to the ICRC, the emblem adopted was formed by reversing the colours of the Swiss flag of Switzerland. This was officially recorded in the 1906 revision of the Convention. However, according to jurist and Red Cross
Flag of Switzerland as the cross arms, so that the total height of the cross is fixed at 20:32 = 5:8 of the height of the flag (in other words, the width of the margin is 6:32 = 3:16). This ratio is also given as a "vexillological recommendation" in the flag regulation used by the Swiss Armed Forces. Flags with a cross of larger relative widths than the prescribed 20:32 = 62.5% remain in wide use; common ratios include 20:26 ≈ 76.9% and 20:28 ≈ 71.4%. For the ensign, the ratio of the size of the cross to the height is likewise 5:8,