Grey, green or drab brown issue shirts were worn under the uniform tunic by Other Ranks. Most overseas issue patterns were collarless, following civilian fashion of the period. A Canadian pre war pattern shirt with collar was also worn, primarily in Canada. Civilian shirts, either gifts from home or from organisations such as the Red Cross were very commonly worn.

Common pattern grey wool flannel half front 3 button shirt. Cotton ticking collar, the buttons are pressed aluminium.

Green wool flannel 4 button shirt made by The Deacon Shirt Company, Belleville Ontario, in 1918. Cotton collar with pressed steel buttons.