Long and Straight
The long blonde straight styles (above) are most commonly used for Agnetha from Abba.
The long black styles are probably most used for Halloween - Morticia, Witches, etc,. although the long coloured styles below have come to be associated with the singer Cher.
The white-streak look can work for a witch or Lily Munster and the bi-colour black/white works as a Cruella de Ville alternative
An ultra-long eg 60 inch style such as the blonde wig above (which can also be found in Black) can be used for Lady Godiva, a mermaid or similar but needs careful management