Necklaces
Age / Length
Birth to 6 months / 10" to 11" (25 to 28 cm)
5 months to 24 months / 11" to 12" (28 to 30 cm)
10 months to 4 years / 12" to 13" (30 to 33 cm)
Elementary age child / 14" to 15" (35 to 38 cm)
Common adult 17" and up (43cm and up)