The Prince of Wales has three standards or banners - his Personal Standard, his Standard for Wales and his Standard for Scotland.
Rules govern their use.
This is the same as the Standard of previous Princes of Wales. The banner includes the Royal Arms, the Coronet of the Heir Apparent and the Arms of the Principality of Wales. The two sizes are used as convenient. Car pennants are not always used, and rarely in the Greater London area. The full-standard size was first flown in March 1970 during His Royal Highness's visit to New Zealand and Australia with The Queen, The Duke of Edinburgh and Princess Anne.