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18K Yellow Gold 3.5mm diamond flat back labret, angled top view showing four-prong martini setting
18K Yellow Gold 3.5mm diamond flat back labret on reflective surface, angled lifestyle shot
3.5mm diamond prong-set flat back labret stud worn in earlobe piercing for fit reference
3.5mm diamond flat back labret shown in upper lobe piercing, close-up fit and scale view
18K Yellow Gold diamond labret flat backs in sizes 2mm, 2.5mm, 3mm, 3.5mm and 4mm compared
18K Yellow Gold 3.5mm diamond flat back labret, side profile showing post length and flat disc
18K White Gold 3.5mm diamond flat back labret, angled view showing four-prong setting and post
18K Rose Gold 3.5mm diamond flat back labret, angled front view highlighting four-prong setting
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
3.5mm Diamond French Milgrain Flat Back Stud
18K Yellow Gold 3.5mm diamond flat back labret, angled top view showing four-prong martini setting
18K Yellow Gold 3.5mm diamond flat back labret on reflective surface, angled lifestyle shot
3.5mm diamond prong-set flat back labret stud worn in earlobe piercing for fit reference
3.5mm diamond flat back labret shown in upper lobe piercing, close-up fit and scale view
18K Yellow Gold diamond labret flat backs in sizes 2mm, 2.5mm, 3mm, 3.5mm and 4mm compared
18K Yellow Gold 3.5mm diamond flat back labret, side profile showing post length and flat disc
18K White Gold 3.5mm diamond flat back labret, angled view showing four-prong setting and post
18K Rose Gold 3.5mm diamond flat back labret, angled front view highlighting four-prong setting
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
3.5mm Diamond French Milgrain Flat Back Stud
Home 18K Gold 3.5mm Diamond Low-Set Prong Flat Back Stud

18K Gold 3.5mm Diamond Low-Set Prong Flat Back Stud

$743 $1,486 Est. Retail Value
18K Yellow Gold 3.5mm diamond flat back labret, angled top view showing four-prong martini setting
18K Yellow Gold 3.5mm diamond flat back labret on reflective surface, angled lifestyle shot
3.5mm diamond prong-set flat back labret stud worn in earlobe piercing for fit reference
3.5mm diamond flat back labret shown in upper lobe piercing, close-up fit and scale view
18K Yellow Gold diamond labret flat backs in sizes 2mm, 2.5mm, 3mm, 3.5mm and 4mm compared
18K Yellow Gold 3.5mm diamond flat back labret, side profile showing post length and flat disc
18K White Gold 3.5mm diamond flat back labret, angled view showing four-prong setting and post
18K Rose Gold 3.5mm diamond flat back labret, angled front view highlighting four-prong setting
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
3.5mm Diamond French Milgrain Flat Back Stud
18K Yellow Gold 3.5mm diamond flat back labret, angled top view showing four-prong martini setting
18K Yellow Gold 3.5mm diamond flat back labret on reflective surface, angled lifestyle shot
3.5mm diamond prong-set flat back labret stud worn in earlobe piercing for fit reference
3.5mm diamond flat back labret shown in upper lobe piercing, close-up fit and scale view
18K Yellow Gold diamond labret flat backs in sizes 2mm, 2.5mm, 3mm, 3.5mm and 4mm compared
18K Yellow Gold 3.5mm diamond flat back labret, side profile showing post length and flat disc
18K White Gold 3.5mm diamond flat back labret, angled view showing four-prong setting and post
18K Rose Gold 3.5mm diamond flat back labret, angled front view highlighting four-prong setting
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
3.5mm Diamond French Milgrain Flat Back Stud

Diamond Size

3.5mm Diamond
2.0mm Diamond 2.5mm Diamond 3.0mm Diamond 3.5mm Diamond
Size Chart
Find Your Perfect Fit
✦
Flat back gauge and length sizing guide for ear piercings

How to size a flat back stud

A flat back stud has a decorative top that threads onto a post ending in a smooth, flat disc. The disc rests against the back of the piercing so it sits flush, won't snag, and stays comfortable enough to sleep on. Two measurements make it fit right: gauge (post thickness) and length (post span).

Gauge — the thickness of the post

Gauge is how thick the post is, and it should match what your piercer used so the stud seats securely without shifting. The scale runs in reverse — a smaller number is a thicker post, so an 18G post is thinner than a 16G. Most flat back ear and nostril piercings use 18G or 16G.

Length — the post that spans your piercing

Length is the distance from the flat disc to the front of the stud — the part that passes through your piercing, measured without the decorative top. While healing, a little extra room (often 8mm) leaves space for swelling; once healed, a shorter post (6mm or 5mm) keeps the top sitting close and flush. Too long and the top spins or catches; too short and the disc presses in.

Not sure? Match the gauge and length on jewelry that already fits you, or check with your piercer.

Still not sure about your size?
Our Piercing Advisors will help you find the right fit for your piercing.
Or add a Piercing Advisor™ fitting to your order › Need a size we don’t carry? Request custom sizing ›
Show info modal
Find Your Perfect Fit
✦
info popup jeweler direct
Still not sure about your size?
Our Piercing Advisors will help you find the right fit for your piercing.
Or add a Piercing Advisor™ fitting to your order › Need a size we don’t carry? Request custom sizing ›
Find Your Perfect Fit
✦
Promotional text for a free piercing advisor service with details on customization and quality assurance.
Still not sure about your size?
Our Piercing Advisors will help you find the right fit for your piercing.
Or add a Piercing Advisor™ fitting to your order › Need a size we don’t carry? Request custom sizing ›
i
Made to order: Ready in 1–2 weeks

Solid 14k Gold

Jeweler Direct

Handmade

Piercing Advisor

Ethical Luxury

Lifetime Warranty

Looking for something different? Request a custom design →

Product Description

Description

A statement 3.5mm VS1 diamond in a low-set prong setting, in solid 18k gold. The low-profile prong keeps the diamond flush and secure on a flat-back post - ideal for cartilage, helix, conch, lobe, and lip.

  • Diamond: ~.15ct (3.5mm), VS1 (ideal), conflict-free genuine diamond
  • Low-set prong setting on a flat-back disc
  • Solid 18k gold | Hypoallergenic
  • Threading:
    • 18G: Threadless Push-Pin
    • 16G: Choose Threaded or Threadless Push-Pin
    • 14G: Threaded
  • Ethically handmade in the USA
Product Details
Materials
Shipping

Pairs Well With

FreshTrends mint green travel jewelry box, closed front view with gold FT Est. 2003 logo Close-up of travel jewelry box interior holding gold piercing studs, earrings, and CZ body jewelry
Travel Jewelry Box $17
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Flat Back Earring Easy Insertion Tool $14
14k yellow gold diamond flower flat back labret stud with bezel-set VS1 diamond, angled product view Step-by-step guide showing how to insert and secure a threadless push pin flat back piercing earring
Tiny Diamond Flower Flat Back Earring $247
14K yellow gold diamond halo flat back labret earring, angled view showing open circle design Four-step illustrated guide for inserting and removing a threadless push pin flat back piercing earring
Diamond Halo 14K Gold Flat Back Earring $303
14K yellow gold diamond climber flat back labret on reflective surface, angled view showing 5-stone arc Step-by-step guide showing how to insert and secure an 18G threadless push pin flat back earring
Mini Climber Diamond 14K Gold Flat Back Earring $352
14k yellow gold flat back labret stud with 3mm white opal cabochon in bezel setting, front view Four-step illustrated guide showing how to insert and remove an 18G threadless push pin flat back stud
3mm Opal Cabochon Flat Back Stud $261

Jeweler-Direct Pricing

Jeweler-Direct means crafted, just for you. By skipping the middleman, we eliminate traditional retail markups — so you can enjoy luxury piercing jewelry without the inflated price.

Fresh Trends Price — $743

Est. Retail Value — $1,486

Fresh Trends Piercing Advisor™

Our complimentary Piercing Advisor™ service ensures your jewelry fits perfectly. After your order, a specialist reviews your selection, verifies your size, and guides you through any adjustments. For jewelry to be eligible for an adjustment, FreshTrends Piercing Advisor™ must be added to your cart at the time of original purchase.

Why It Matters:

• Anatomy varies, and size is crucial

• A specialist confirms your fit before we craft your piece

• You get a flawless, comfortable result—every time

Piercing Advisor Service

Handcrafted Just For You!

Our in-house jewelry designer and artisans create one-of-a-kind piercing jewelry from solid 14k gold and 950 platinum, always 100% nickel-free.

Each piece is made-to-order and never mass-produced, allowing for many gemstone and size options for the perfect fit. We take pride in hand-crafting fine body jewelry in the USA.

Fresh Trends Fine Jewelry

Because every piercing deserves its masterpiece.

Ready to Gift

Your jewelry arrives in our signature packaging—a keepsake box with a soft green pouch and a Wear & Care Guide. Premium pieces are showcased in an LED presentation box that elevates every gifting moment.

Fresh Trends Packaging

Fresh Trends® Lifetime Warranty

Every piece we craft is designed for lifelong wear. If your jewelry ever shows a manufacturing defect, we’ll repair or replace it—complimentary, for life.

Lifetime Confidence. Handmade Quality.

Gold earring with clear gemstones on a soft pink fabric background

Sustainable Jewelry

We use recycled metals to help reduce the carbon footprint of manufacturing and the negative impact of metal mining.

We plant one new tree per order in partnership with Ecologi to help restore nature and reduce the carbon footprint of our operations.

ecology

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