Canada was the first Commonwealth country to dispense with the RAF system. The maple leaf replaced the British-style inner circle to give it a distinctive Canadian character. Although the maple leaf roundel was approved for use by the RCAF in 1924, it was not until after the war that it began to be used on aircraft. It was, however, used on the ensign beginning in 1941. Popularization of the "maple leaf" roundel during the war years was partly achieved through unofficial means, as the Ottawa RCAF Flyers hockey team wore a variant of the future RCAF "maple leaf" roundel on team sweaters. Following the Second World War, from 1946–1948 a roundel with a red leaf set inside a blue disk (referred to as the RCAF Type 1 roundel) was used on non-camouflaged aircraft. Several versions of the maple leaf roundel existed from wartime to 1965. Sizes of the leaf and the ring thickness sometimes changed, and some versions of the RCAF roundel included a white or yellow outline, which were specific to certain aircraft.