Your choice of chain length depend on where you want the pendant to lay on your chest.

Here is our recommendations: 

For Women:

Slim or petite: 45 cm / 18 inches

Plus sizes: 60 cm / 24 inches

For Men:

Slim or bigger: 60 cm / 24 inches

For all Children: 45 cm / 18 inches

 

For reference

chain length on men