Magnetic necklaces are 16 inches to 24 inches.  The standard price is set at 16" to 18" . Then the price increases for each inch over 18" at the rate of 50 cents per inch.  

MAGNETIC NECKLACE MN001 Orig: $28.00 Sale: $25.99	MAGNETIC NECKLACE MN002 Orig: $28.00 Sale: $25.99	MAGNETIC NECKLACE MN003 Orig: $28.00 Sale: $25.99	MAGNETIC NECKLACE MN004 Orig: $32.00 Sale: $29.95
MAGNETIC NECKLACE MN005 Orig: $40.00 Sale: $36.95	MAGNETIC NECKLACE MN006 Orig: $40.00 Sale: $36.99	MAGNETIC NECKLACE - MN007 Orig: $28.00 Sale: $26.95	MAGNETIC NECKLACE - MN008 Orig: $34.00 Sale: $29.95
Magnetic Necklace MN09 Orig: $45.00 Sale: $40.00	Magnetic Necklace MN10 Orig: $54.95 Sale: $44.95	MAGNETIC CHOKER Orig: $45.00 Sale: $30.00	MAGNETIC CHOKER Orig: $45.00 Sale: $30.00
MAGNETIC CHOKER Orig: $35.00 Sale: $24.99