Necklace sizes

For standard chains and fine necklaces the diagram and table below can be used as a guide based on an average adult.
Size – Where the necklace should sit
40cm – Choker
45cm – Collarbone Length
50cm – 5cm Below Collarbone
55cm  – Above Bust Line
60cm  – Bust Line
76cm  – Below Bust Line
91cm  – Waist Line