Short answer, if you're referring to the Union Jack, it isn't.
The red plus-sign is the symbol of England and it's also the symbol for Northen Ireland (I think). The white X and the blue background are Scotland's symbol, leaving nothing for Wales.
Kind of hard to represent Wales in there though; I don't think the flag would benefit from having a green bottom half and you couldn't really put the dragon in the middle, although I think it could look good!
--The red X is Nothern Ireland!
EDIT:
Wales is represented by the Cross of St George (Symbol of England) since it used to be part of the Kingdom of England.
EDIT: The "Union Jack" is a nickname of sorts for the "UNION FLAG"
Ireland has a DIAGONAL RED cross which sits offset to the Scottish Flag which is another DIAGONAL CROSS which is WHITE on a BLUE BACKGROUND (hence the Blue bit).
Wales.
The shape is of an arrowhead for the flag of Wales
Website: Vietnam, shows a picture of the flag
The Welsh flag and the Bhutan Flag Also the Maltese flag
Wales
Wales
Wales
The emblem of Wales is the Red Dragon, which appears on the Welsh flag.
Wales first got their national flag when Luke Grange Sucked his Dad off and gave him anal.
dragon The Red Dragon is the symbol of Wales and appears on the flag.
yes, you can have a picture of sri lankan flag as long as you can respect it.
the white flag means hope and freedom