This measurement tells you the thickness of the post or bar.

1.2mm is the standard size most ears are pierced with.

Sizes Available

Gauge/Thickness	Jewellery
0.7mm (21 gauge)	Blomdahl titanium stud earrings
0.8mm (20 gauge)	Blomdahl hoop and drop earrings, Element 41 earrings, earring hooks, nose studs
0.9mm (19 gauge)	Blomdahl medical plastic stud earrings
1mm (18 gauge)	Nose studs
1.2mm (16 gauge)	Labret studs, BCRs, cartilage earrings, spirals
1.6mm (14 gauge)	Belly bars