Your choice of necklace length depends on the look you’re trying to create as well as how it will fit.
An average 16” or 45cm necklace would typically fall to just below the collar bone on a size 12-14 woman of 5’ 5” height.
The same length necklace would fall differently on someone of a different build and height.
We may be able to extend or shorten some necklaces for a small charge. For an idea of the length that works best for you, measure one of your own necklaces, or use a piece of string!