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 squares until 1889, when its dimensions were officially set. The civil and state ensign of Switzerland, used by Swiss ships, boats and non-governmental bodies, is rectangular in shape and has the more common proportions of 3:2. The Swiss flag is one of only two square sovereign-state flags, the other being the flag of Vatican City. The emblem of the Red Cross is the Swiss flag with switched colours. According to the 2017 flag law (SR 232.21), "The Swiss flag shows a Swiss cross on a square background". Special provisions are made for the naval ensign and for civil aircraft identification.