 In the Royal Canadian Air Force, the insignia is one -inch (13 mm) stripe with a -inch (6.4 mm) stripe above it.The rank insignia of a sub-lieutenant is a -inch (6.4 mm) stripe with one -inch (13 mm) stripe with the executive curl above it.On CADPAT and flying uniforms, the insignia is white on army slip-ons and dark blue on air force slip-ons.