The Sterling Fantasy Necklace is available in seven sizes and the 14k Gold Fantasy Necklace in five sizes. 

Sterling necklace Size inch
A 23.6
B 31.4
C 35.4
D 39.4
E 43.3
F 47.2
G 100

14k Gold necklace Size cm
A 60
B 70
C 80
D 90
E 100