Officer's Service Dress caps had a khaki body. Colonels had a black patent leather brim edged with a single row of gold oak leaves. Generals had a patent leather brim with two rows of oak leaves. A number of Canadian senior officers wore Canadian Pattern caps with maple leaves substituting for the oak leaves. Officers below the rank of Colonel wore a khaki Service Dress cap with a khaki brim. Staff Officers wore a scarlet band around the body of the cap, officers on the Provost Marshal staff wore a blue or green band.
In the field, officers sometimes wore Other Rank's pattern trench caps or Balaclavas.