The flag features several references to the towns traditional industry of lock and key-making. The field itself is divided between a red hoist and a blue centre and fly by a vertical embattled line, the pattern of which symbolises the pins of locking mechanisms. In the hoist are three padlocks and the centre of the design has crossed keys with a crown above them, the crown recalling how Queen Elizabeth I granted permission to the town to manufacture royal locks and the towns subsequent status as a king of lock-making. The colours of blue, red and gold were drawn from the arms of the former Willenhall Urban District Council.
- The Flag Institute (UK)