Cellebrate your patriotism with an unusual Union Jack. Union Jack, Pure & simple
Although the most common ratio is 1:2, other ratios exist. The Royal Navy’s flag code book, BR20 Flags of All Nations, states that both 1:2 and 3:5 versions are official.
The 3:5 version is most commonly used by the British Army and is sometimes known as the War flag. In this version the innermost points of the lower left and upper right diagonals of the St Patrick’s cross are cut off or truncated.
The Queen’s Harbour Master’s flag, like the Pilot Jack, is a 1:2 flag that contains a white-bordered Union Flag that is longer than 1:2. The jacks of ships flying variants of the Blue Ensign are square and have a square Union Flag in the canton.
The Queen’s Colours of Army regiments are 36 by 43 inches (910 mm × 1,090 mm); on them, the bars of the cross and saltire are of equal width; so are their respective fimbriations, which are very narrow.