The thinnest chain in the lineup. The 1MM Ball Chain Necklace is a diamond-cut 18k gold filled chain so delicate it almost disappears — the perfect base layer under heavier chains or pendants, or a barely-there piece to wear solo. If you're building a neck stack, this is where you start. 18k gold filled 1mm diamond-cut ball chain Lobster clasp closure Available in 14", 16", and 18" Ideal for layering under pendants or heavier chains