The difference between 16G and 18G earrings is the thickness of the post. This is a common question when buying helix, cartilage, or flat back jewelry online.
What does 16G mean?
16G
16G means the post is approximately 1.2 mm thick. It is thicker than an 18G post and is commonly listed for many cartilage jewelry styles.
What does 18G mean?
18G
18G means the post is approximately 1.0 mm thick. It is a slimmer option and is often listed for healed cartilage piercings.
The gauge that works for you depends on the existing piercing channel. A lower number is not automatically better, and you should not force a thicker post into a smaller piercing.
16G vs 18G earrings at a glance
Detail
16G
18G
Post thickness
1.2 mm
1.0 mm
Relative size
Thicker
Slimmer
Common listing use
Many cartilage styles
Healed cartilage styles
Best choice
Match your piercing
Which gauge should you choose?
Start with the gauge you already wear. If you are replacing a post, check the original jewelry packaging or ask your piercer to confirm the size.
The White CZ Crown Flat Back Stud lists 16G, 18G, and 20G options, along with 6 mm, 8 mm, and 10 mm lengths.
Does gauge affect comfort?
Gauge can affect fit, but comfort also depends on post length, backing, front size, and the condition of the piercing. A post that is too thick may be difficult to insert. A post that is too short can pinch, while an overly long post may move and catch on hair.
The Crystal 3A CZ Bar Flat Back Piercing Earring is listed with 16G and 18G options, 6 mm, 8 mm, and 10 mm lengths, and a G23 titanium labret.
Can you change from 16G to 18G?
Possibly, but the change should be based on the piercing and professional advice. Do not push jewelry through if it causes pain or resistance.
For a healing cartilage piercing, follow your piercer’s instructions. The Association of Professional Piercers recommends minimizing pressure and friction during healing .
Final answer
16G is about 1.2 mm and 18G is about 1.0 mm. Neither is universally better. Match the gauge and post length to your piercing, then browse the Erica Jewels titanium earrings collection .
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