⚡ Quick Answer (30 seconds)
- Ear gauge numbers work backwards: higher number = thinner jewelry. 20G is thin (0.8 mm); 00G is thick (10 mm).
- Standard factory ear piercings are 20G (0.8 mm) or 18G (1.0 mm).
- Safe stretching rule: wait 6–8 weeks between sizes, and only stretch by one gauge (about 0.2 mm) at a time.
→ See the full chart, converter, and stretching timeline below.
Ear gauge sizing confuses almost everyone at first — because the numbering system is inverse, and the US gauge system doesn’t line up cleanly with millimeters or inches. This is the cheat sheet we wish we had when we started stretching piercings: a free printable chart, an exact MM/inch converter, and the realistic timeline most piercers actually use.
The Complete Ear Gauge Size Chart (MM / Inch / Fractional)
This is the most frequently referenced gauge conversion. Bookmark it or save the image.
| Gauge (GA/G) | Millimeters (mm) | Inches (decimal) | Inches (fractional) | Common use |
|---|---|---|---|---|
| 20G | 0.8 mm | 0.032″ | 1/32″ | Standard earring post / nose stud |
| 18G | 1.0 mm | 0.040″ | — | Nose, lip, cartilage |
| 16G | 1.2 mm | 0.047″ | 3/64″ | Helix, tragus, lip, septum |
| 14G | 1.6 mm | 0.063″ | 1/16″ | Nipple, navel, industrial |
| 12G | 2.0 mm | 0.081″ | 5/64″ | Stretched lobe, heavy gauge septum |
| 10G | 2.4 mm | 0.102″ | 7/64″ | Early lobe stretching |
| 8G | 3.2 mm | 0.128″ | 1/8″ | Lobe stretching |
| 6G | 4.0 mm | 0.162″ | 5/32″ | Lobe stretching |
| 4G | 5.0 mm | 0.204″ | 13/64″ | Lobe stretching |
| 2G | 6.0 mm | 0.250″ | 1/4″ | Lobe stretching |
| 0G | 8.0 mm | 0.312″ | 5/16″ | Lobe stretching |
| 00G | 10.0 mm | 0.400″ | 3/8″ | Lobe stretching |
| — | 11 mm | 0.433″ | 7/16″ | Past 00G — measured in mm only |
| — | 12 mm | 0.472″ | 15/32″ | Past 00G |
| — | 13 mm | 0.511″ | 1/2″ | Past 00G |
| — | 14 mm | 0.551″ | 9/16″ | Past 00G |
| — | 16 mm | 0.625″ | 5/8″ | Past 00G |
| — | 19 mm | 0.750″ | 3/4″ | Past 00G |
| — | 22 mm | 0.875″ | 7/8″ | Past 00G |
| — | 25 mm | 1.000″ | 1″ | Past 00G |
Why Do Gauge Numbers Run Backwards?
The system comes from the wire drawing industry of the 1800s: each time a wire was pulled through a die to make it thinner, a “gauge” number was added. A wire pulled through the die twenty times (20G) is thinner than one pulled through only fourteen times (14G). Body jewelry inherited this convention.
The practical consequence: when stretching, you count down — from 14G to 12G to 10G, not up.
Standard Gauge by Piercing Location
| Piercing | Standard Gauge | Diameter |
|---|---|---|
| Standard earlobe (pierced at a salon) | 20G | 0.8 mm |
| Professional earlobe piercing (studio) | 18G–16G | 1.0–1.2 mm |
| Helix / Tragus / Conch | 16G | 1.2 mm |
| Nostril | 18G or 20G | 1.0 or 0.8 mm |
| Septum | 14G or 16G | 1.6 or 1.2 mm |
| Lip / Labret / Medusa | 14G or 16G | 1.6 or 1.2 mm |
| Tongue | 14G | 1.6 mm |
| Nipple | 14G | 1.6 mm |
| Navel / Belly button | 14G | 1.6 mm |
| Industrial (cartilage bar) | 14G | 1.6 mm |
✨ Start Stretching Safely With ASTM F-136 Titanium
Quality tapers and plugs matter: low-grade acrylic can tear the channel and trap bacteria. Implant-grade titanium (ASTM F-136) is the only metal nickel-free enough for fresh stretches.
Safe Stretching Timeline (The Rule of Thumb)
Stretching too fast is the #1 cause of the “blowout” — when the inner channel skin turns inside out, permanently scarring the lobe. Safe stretching requires patience:
| From → To | Wait Minimum | What’s Safe |
|---|---|---|
| 14G → 12G | 8 weeks | One size up. Use taper + oil. |
| 12G → 10G | 8 weeks | Channel should feel loose first. |
| 10G → 8G | 8–10 weeks | Larger skip = higher blowout risk. |
| 8G → 6G | 10 weeks | Massage jojoba oil daily. |
| 6G → 4G | 10–12 weeks | Consider double-flare plugs now. |
| 4G → 2G | 12 weeks | Skin elasticity starts to change. |
| 2G → 0G | 12–16 weeks | The “critical size”: past here is harder to reverse. |
| 0G → 00G | 16+ weeks | Use only single-flare + O-rings or no-flare. |
| 00G → 1/2″+ | 16+ weeks per step | Tape wrapping is common at this stage. |
Signs you stretched too soon: bleeding, pain lasting more than 24 hours, a ring of torn skin on the edge of the hole, or the plug feeling “swimmy.” If any of these appear, step back one size and wait 4–6 weeks before trying again.
The “Point of No Return” for Lobe Stretching
Most lobes will shrink back if you remove the plug, up to around 2G (6 mm). Past 0G (8 mm), many people find their lobes don’t close fully, and may require surgical repair if you want to return to “normal.” This isn’t a deal-breaker for most people who stretch intentionally — but it’s important to know going in.
Best Materials by Stretching Stage
| Stage | Best Material | Avoid |
|---|---|---|
| Fresh stretch (first 2 weeks) | ASTM F-136 titanium or glass | Acrylic, wood, stone |
| Healed channel, daily wear | Titanium, glass, niobium | Poor-grade steel |
| Very stretched (0G+) | Silicone, wood (short wear), organic stone | Acrylic (porous) |
| Special occasion | Double-flare glass, 14K gold | Gold-plated anything |
Single-Flare vs Double-Flare vs No-Flare Plugs
- Single-flare: one lip, held in by an O-ring on the other side. Easiest to insert; best for fresh stretches.
- Double-flare: both sides flared — stays in without O-rings. Requires a healed, flexible channel. Goes in with a stretching motion.
- No-flare (saddle/tunnel): straight cylinder with O-rings on both sides. Most versatile for mid-stretch sizes.
Daily Aftercare for Stretched Ears
- Massage with jojoba or emu oil daily — keeps tissue supple and reduces micro-tearing.
- Clean plugs with mild soap + warm water once a week. Wood plugs need oiling, not soap.
- Rotate plug materials every 1–2 days to avoid pressure points in the same spot.
- “Downsize” periodically — wear a one-gauge-smaller plug overnight to help circulation.
- Watch for sebum / dead skin buildup — this is the source of “stretch funk” smell.
For professional safety standards, refer to the Association of Professional Piercers (APP).
Frequently Asked Questions
What gauge is a standard earring?
Most factory-pierced ear studs are 20 gauge (0.8 mm). Studios and professional piercers usually use 18 gauge (1.0 mm) or 16 gauge (1.2 mm) for a more stable piercing that heals with less migration.
What’s the difference between gauge and millimeters?
Gauge is a US wire-sizing system where higher numbers mean thinner jewelry. Millimeters are a direct measurement of thickness. 20G = 0.8 mm, 18G = 1.0 mm, 16G = 1.2 mm, 14G = 1.6 mm. Beyond 00G (10 mm), piercers stop using gauges and measure only in mm or fractional inches.
Can I skip a gauge size when stretching?
No — skipping sizes is the primary cause of blowouts (permanent scarring where the inner channel inverts). Always stretch by one gauge at a time, wait at least 6–8 weeks between sizes, and never force a taper.
What gauge should I get pierced at for a new lobe piercing?
Ask for 16G (1.2 mm) or 14G (1.6 mm) at a professional studio. This is thicker than a standard mall-gun piercing (20G) and heals more stably, with a lower rejection rate. You can wear standard 20G studs later once healed.
How long does it take to stretch from 14G to 00G?
Safely: 18–24 months minimum. You’re going through 12 gauge sizes (14 → 12 → 10 → 8 → 6 → 4 → 2 → 0 → 00), and each step needs 8–12+ weeks of rest. Rushing produces blowouts that are permanent.
What’s the biggest safe gauge to still close back up?
Most ears shrink back from up to 2G (6 mm) without surgery. Past 0G (8 mm), the lobe usually stays open permanently. Genetics play a role — thinner lobes shrink more than thicker ones.
Why does my stretched lobe smell?
The smell (“ear funk”) is dead skin and sebum collecting in the channel. Clean plugs weekly with soap and water, and rotate between materials. Acrylic plugs are porous and hold smell more than titanium, glass, or silicone.
Are fake gauges (cheaters) safe?
Yes — fake gauge earrings (also called “cheater plugs” or “illusion plugs”) look like stretched plugs but clip into a standard 18–20G earlobe piercing. They’re fully reversible, require no stretching, and are a popular first step for people trying the look.
About the author
Mona Lin — Head of Piercing Education at The Body Rings. Member of the Association of Professional Piercers (APP), OSHA Bloodborne Pathogens certified, with 10+ years of professional body piercing and jewelry safety experience.