Flat back earrings are designed for comfort, safety, and everyday wear but choosing the right size is what truly makes them feel effortless.

If you’ve ever wondered “Should I get 6mm or 8mm?” or “What gauge do I need?”, this guide will walk you through everything you need to know.

 

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Why Size Matters for Flat Back Earrings

Unlike traditional butterfly backs, flat back earrings sit flush against your skin. That means:

1. The post length determines comfort and fit
2. The gauge (thickness) affects stability and compatibility
3. The wrong size can lead to tightness, irritation, or snagging

Getting the right size ensures your earrings feel like they’re barely there.

 

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Flat Back Post Length Guide (Most Important)

Standard Lengths

• 6mm (Most Common)
  • Ideal for healed piercings and a snug, everyday fit.
    This is the default for most DOVIANA flat backs.
• 8mm (Extra Room)
  Better for:
  • Initial piercings
  • Swelling during healing
  • Thicker ear tissue
• 10mm+ (Rare Cases)
  Used for specific placements or significant swelling.

 

 

Why Does My New Piercing Look Like It Has a Long or Loose Back?

If you just got a new piercing, it’s completely normal for your flat back earring to look slightly longer or feel a bit loose.

This is intentional.

When a piercing is fresh, your ear will naturally swell during the healing process. To accommodate this, piercers use a longer post (usually 8mm or more) to ensure:

1. There is enough room for swelling
2. The jewelry doesn’t press into the skin
3. Proper airflow helps with healing

At first, this extra space can make the earring appear like it’s “sticking out” or moving more than expected.

 

When Will It Feel More Fitted?

As the swelling goes down (usually within a few weeks), the longer post will start to feel looser. That’s your sign it’s time to switch to a shorter length.

💡 This is called downsizing and it’s an essential step for both comfort and healing.

At DOVIANA, we recommend:

1. Starting with a longer post for new piercings
2. Returning after the initial healing period to downsize to a snug fit

💡 Pro tip: After healing, downsizing to a shorter post is key for comfort and aesthetics.
At DOVIANA, we offer complimentary downsizing if you get pierced by us.

 

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How to Choose Your Length

Choose 6mm if:

1. Your piercing is fully healed
2. You want a clean, fitted look
3. You wear earrings daily (including sleeping)

Choose 8mm if:

1. Your piercing is new or still healing
2. Your ear feels tight with shorter posts
3. You prefer a slightly looser fit

 

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Flat Back Gauge Guide (Thickness)

Common Gauges

• 18G (1.0mm) - Standard
  • Most common for ear piercings
  • Comfortable and widely compatible
  • Default for DOVIANA flat backs

 

• 16G (1.2mm) - Slightly Thicker
  • Used for cartilage (helix, conch, tragus)
  • More secure fit

 

• 20G (0.8mm) - Thinner
  • Common in traditional earrings
  • Less ideal for flat backs

 

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How to Choose Your Gauge

1. If you were pierced with a needle → 18G or 16G
2. If you used a piercing gun → likely 20G
3. For most customers → 18G is the safest choice

💡 Wearing thinner jewelry (like 20G) long-term can cause instability in flat back styles. Visit our New York stores for a complimentary gauge check and personalized sizing assistance for your piercings.

 

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Common Sizing Mistakes to Avoid

1. Choosing a post that’s too short → causes pressure and discomfort
2. Choosing a post that’s too long → leads to movement and irritation
3. Mixing incompatible gauges → jewelry won’t fit properly

 

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DOVIANA’s Recommended Sizes

For most customers, we recommend:

1. Gauge: 18G
2. Length: 6mm for healed piercings, 8mm for new piercings

All of our flat back earrings are designed for:

1. Everyday comfort
2. Sleeping and showering
3. Sensitive ears (with implant-grade titanium or 14K gold options)

 

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When to Change Your Size

You may need to switch sizes if:

1. Your earring feels tight or leaves marks
2. There’s visible swelling
3. The post sticks out too far
4. You recently got pierced (time to downsize)

 

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Not Sure What Size You Need?

If you’re unsure, the easiest way is to visit us in-store:

1. We’ll check your current fit
2. Help you find the perfect size
3. Offer complimentary downsizing

A properly fitted flat back earring should feel secure, comfortable, and almost invisible in your daily routine.

 

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Upgrade Your Jewelry at DOVIANA

If you’re ready to upgrade your jewelry, visit DOVIANA in SoHo or the West Village - where fine jewelry meets professional piercing in NYC.

At DOVIANA, we intentionally curate three material tiers to fit your lifestyle, sensitivity, and style:

• 14K solid gold - fine jewelry Shop 14K Solid Gold Regular Earrings  |  Flat-Back Studs  |  Clickers  |  Rings  |  Necklaces
• Sterling silver and gold plated sterling silver - semi-fine jewelry Shop Sterling Silver Earrings  |  Necklaces  |  Bracelets  |  Rings  |  Anklets
• Medical-grade titanium - professional piercing material Shop Titanium Flat-Back Studs  |  Clickers  |  Rings

Whether you’re getting a new piercing or upgrading your current jewelry, choosing the right material is key to both comfort and long-term wear.

 

Visit DOVIANA Fine Jewelry and Getting Pierced in NYC

📍 SoHo Store (Check Google Map Profile)
Address: 174 Spring St, New York, NY, 10012 
Hours: Monday – Sunday: 11:00 AM – 7:00 PM Saturday: 11:00 AM – 7:30 PM

📍 West Village Store (Check Google Map Profile)
Address: 334 Bleecker St, New York, NY, 10014
Hours: Monday – Sunday: 11:00 AM – 7:00 PM Saturday: 11:00 AM – 7:30 PM

Walk-ins are welcome, or book online to secure your piercing appointment: https://doviana.as.me

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Make It a Full NYC Experience

Planning a full jewelry refresh?

Many clients pair their new piercing with our Permanent Bracelet NYC experience, a meaningful, custom-fit piece designed to stay with you.

It’s the perfect way to turn a simple piercing visit into something lasting✨

 

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Frequently Asked Questions

What is the standard size for flat back earrings?

The most common flat back earring sizes are:

1. 18G (1.0mm) for most ear piercings
2. 16G (1.2mm) for some cartilage and body piercings
3. 6mm or 8mm post lengths for healed ear piercings

The correct size depends on your anatomy, piercing placement, and whether the piercing is fresh or healed.

What gauge are most ear piercings?

Most standard ear piercings are pierced with:

1. 18G for lobes, helix, tragus, flat, and conch piercings
2. 16G for some cartilage piercings and body piercings

Professional piercers may choose different gauges depending on anatomy and jewelry style.

What flat back length should I get?

For most healed ear piercings:

1. 6mm is the most common fitted size
2. 8mm may be more comfortable for thicker anatomy or healing piercings

Fresh piercings are usually pierced with longer jewelry to allow room for swelling.

Why does my new piercing jewelry look too long?

Starter jewelry is intentionally longer to accommodate swelling during the healing process. Once swelling decreases, many piercings require downsizing to a shorter post for a more secure and comfortable fit.

Related: When Should You Downsize Your Piercing? Complete Ear Piercing Guide

Can I sleep in flat back earrings?

Yes. Flat back earrings are one of the most comfortable styles for sleeping because the flat backing sits smoothly against the skin and reduces pressure compared to traditional butterfly backs.

Related: Flat Back Earrings vs Butterfly Back - Which Is Better for Daily Wear?

What material is best for sensitive ears?

Implant-grade titanium, 14K solid gold, and high-quality sterling silver are among the best options for sensitive ears. 

Explore:

1. Titanium Flat Back Earrings
2. 14K Solid Gold Flat Back Earrings

How do I know if my flat back post is too short?

A flat back post may be too short if:

1. The jewelry feels tight or pressing into the skin
2. Swelling causes discomfort
3. The backing becomes difficult to see
4. The jewelry feels embedded

Fresh piercings should always leave room for swelling.

How do I know if my flat back post is too long?

A flat back post may be too long if:

1. Excess bar length is visible
2. The jewelry moves excessively
3. It catches on hair or clothing
4. The piercing becomes irritated from movement

A professional downsizing may help improve healing and comfort.