Two words: Layer Up.
Layering thin necklaces with others simply makes them stand out more than they ever could by themselves.
An example can be seen below where I pair my initial necklace with another thin, but slightly longer, pendent necklace; I also add a long, rope necklace and gold choker to top the look. You can see how each one compliments each other and how a thin necklace has become part of a statement piece.
Make sure all your necklaces have a significant difference in length to avoid them from looking messy (try to keep it as neat as possible). Also, make sure all your necklaces are the same colour – never clash gold with silver.
Just remember that once you give it a go, you’ll never be able to wear a thin necklace by itself again.
*All necklaces were from Accessorize, including the initial necklace and long, rope necklace from the Z For Accessorize range.*