2mm 14k solid gold Singapore chain necklace available in 18", 20", 24" and 30" length, from Apples of Gold Jewelry.
Includes secure, industry-preferred lobster claw clasp.
The 2mm singapore chain weighs approx:
18" - 3.64 grams
20" - 4.1 grams
24" - 4.68 grams
30" - 5.64 grams
Also available in 1mm, 1.1mm, 1.4mm and 1.7mm smaller widths (shown below).