Prong-Set Marquise Flat Back Stud - Onyx

Q: What size are the flat back earrings?

Cords Club's Flat Backs are 18 gauge and come with a 6mm long Flat Back post.A 6mm post is a great length for most people, so we'd recommend starting there! We do also have a range of other sizes available and sold separately. If you have questions about sizing, we'd love to help!

Q: Are your flat backs sold individually? Or in pairs?

Both! Grab a single if you’re mixing and matching, or a pair to save 10%

Q: Do I need to buy the flat back applicator, too?

Our Flat Back Applicator is a great tool but it's not necessary! The Flat Back Applicator is designed to help make the process of changing your flat backs faster and easier, but you can definitely change your earrings without one. The choice is totally up to you!

Prong-Set Marquise Flat Back Stud - Onyx

Sleep-Friendly

Hypoallergenic

Waterproof

DESCRIPTION

The onyx tone brings mystery. The marquise shape brings edge. Together, they make a flat back stud that’s anything but boring.

This listing is for a single ASTM F136 implant grade titanium push-pin flat back stud. Note that the nature of prong settings can make them catch on hair or fibers

Measurements:

18 GA (1mm), though compatible with most 16 or 20 gauge threadless labret posts
Post is 1/4 inch (6mm) in length, with a 4mm disc on back.
Approx. size of gem is 4.99mm x 3mm
Refer to listing images to get an idea of the size of the stud on-ear. Check your own ear measurement before ordering

Materials: 18K PVD Gold Plated ASTM-F136 Titanium, ASTM-F136 Titanium, prong-set zirconia

Care: Water and tarnish proof with proper care. If exposed to salt water, chlorine, or lotions/perfumes, rinse off with cool-warm water and gently dry. When not wearing, store in a dry, cool place. Do not pull, twist, or tug on your jewelry.

CARE

Soak your studs in warm water with a few drops of dish soap for about 15 minutes. Gently clean with a soft cloth and store safely.

365-DAY GUARANTEE

At Cords Club, we are committed to providing durable and high-quality products. That's why we offer a 365 Day Guarantee on all our items. If you experience any defects or issues within the first year, simply contact us for a hassle-free replacement. Enjoy peace of mind and shop with confidence knowing that your satisfaction is our top priority!

LIGHTNING-FAST SHIPPING

Our in-house shipping team carefully packs and ships orders within 4 business days. During peak launches, please allow extra time.

Free Shipping Over $75

Free Shipping
Over $75

365-Day Guarantee

365-Day
Guarantee

Highly Reviewed

Highly
Reviewed

I'm new to flat backs. What is the most important thing for me to know?

The first thing you'll want to learn is how to keep your Flat Backs nice and secure. Just like you'd tie your running shoes to make sure they stay on your feet for a run, you'll need to adjust your Flat Backs to keep them in place, too!

But don't worry! It's an easy peasy process, and we'll help you through the learning curve. <3

Here are a few resources to get you started:

Review the Flat Back tips and tricks info guide included with your order
Check out this helpful playlist of how-to videos
Connect with our customer service team for personalized help

What size are the flat back earrings?

Cords Club's Flat Backs are 18 gauge and come with a 6mm long Flat Back post.

A 6mm post is a great length for most people, so we'd recommend starting there! We do also have a range of other sizes available and sold separately. If you have questions about sizing, we'd love to help!

Are your flat backs sold individually? Or in pairs?

Both! Grab a single if you’re mixing and matching, or a pair to save 10%

Do I need to buy the flat back applicator, too?

Our Flat Back Applicator is a great tool but it's not necessary! The Flat Back Applicator is designed to help make the process of changing your flat backs faster and easier, but you can definitely change your earrings without one. The choice is totally up to you!

Trusted by Over a Quarter Million Happy Ears

A close-up of an ear with multiple silver piercings, including heart, bow, and gem-shaped earrings.

Tia C.

Verified Customer

Perfect for almost any piercing! I’ll use it elsewhere once I add more piercings to my ears! Love!!

Amanda H.

Verified Customer

Everyone needs this one!!!

This tiny bow is so dainty and cute! Perfect size for my stacked lobe

Alison B.

Verified Customer

Looks so cute in my forward helix! Will likely get another one for my newest forward helix, I love her!

Andrea S.

Verified Customer

I wear these almost everyday. They're cute but also lightweight so I don't feel like they're stretching my ears at all

Briana C.

Verified Customer

Sparkly!! Gorgeous little hoops! They shine super bright, and are super comfortable!

Reason #1:ComfortSleep-proof, won’t poke you, and can be worn all day and night

Reason #2:Happy PiercingsMade from implant-grade materials that are perfect for sensitive ears

Reason #3:No Green SkinWaterproof, tarnish-proof jewelry that’s been tested and designed to last

Reason #4:You + Cords ClubJoin a collaborative, stylish club and share your jewelry ideas with us!

CORDS CLUB

$15

Moon Flat Back - Single

COMPETITOR AVG.

$36

Moon Flat Back - Single

Feature

Single Stud

Pair of Studs

Material

HypoallergenicNickel-Free

Warranty

CORDS CLUB

$15our price

~~$30~~$27 our price

ASTM F136 Titanium

365-day

BRAND A

$302.0x more

$60 2.0x more

ASTM F136 Titanium

noneFinal Sale - no recourse

BRAND B

$382.5x more

$76 2.5x more

ASTM F136 Titanium

30-day$10 fee

BRAND C

$402.7x more

$80 2.7x more

ASTM F136 Titanium

365-day

Comfortable For 24/7 Wear
Sleep, Shower, And Workout Friendly
Hypoallergenic And Nickel Free
Lightweight And Secure

Comfortable For 24/7 Wear
Sleep, Shower, And Workout Friendly
Hypoallergenic And Nickel Free
Lightweight And Secure

Comfortable For 24/7 Wear
Sleep, Shower, And Workout Friendly
Hypoallergenic And Nickel Free
Lightweight And Secure

How To Apply

Flat Back Studs

How To Remove

Flat Back Studs

How To Apply Flat Back Studs With An Applicator

How To Tighten

Your Flat Backs

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Highly Recommended for Sensitive Ears

3.8

Rated 3.8 out of 5 stars

Based on 5 reviews

Total 5 star reviews: 2 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 1 Total 1 star reviews: 0

60%would recommend this product

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Kelsie h. l.
Verified Buyer
5 days ago
Rated 5 out of 5 stars
Edgy
I love the claps around this. It gives it a different look and vibe.
Was this helpful?
CC
Cords Club
21 seconds ago
Hi Kelsie! We're so glad you love the edgy vibe the prong setting brings! 💎 It's wonderful to hear how the unique claps give it that different look you're loving. ✨Jace with Cords Club
Ana A.
Verified Buyer
2 weeks ago
Rated 4 out of 5 stars
Very cute but smaller than expected
These earring are very cute but ed than expected. I didn’t pay attention to all the pics. Still very cute though. I have other flat backs that twist on and some have fallen off. These don’t since they are push ins.
Was this helpful?
CC
Cords Club
2 weeks ago
Hi Ana ✨,

Thank you so much for your feedback! We're so happy to hear you think the Prong-Set Marquise Flat Back Stud - Onyx is very cute—we absolutely love this elegant design too! We totally understand what you mean about the size being smaller than expected, and we completely get how easy it is to miss those sizing details in the photos! Size can really make a difference in how a piece looks once you have it in hand, and we appreciate you being honest about that. We're so glad to hear you're happy with the push-in closure system and that it's giving you that extra security compared to twist-on flat backs! There's nothing worse than losing an earring because the closure wasn't secure enough, so we're thrilled the push-in mechanism is working well for you and giving you that peace of mind. We really appreciate you sharing this detailed insight about both the size and the closure experience—this kind of feedback is so valuable for us and helps other customers know what to expect when they're considering this piece.

Thanks for taking the time to share your honest thoughts with us—it means so much! 💖

😘~ Elvie with Cords Club
Danielle
Verified Buyer
2 months ago
Rated 2 out of 5 stars
Beautiful BUT…
I absolutely love the look of this stud, however… it gets snagged on absolutely everything. Blankets, pillow cases, hoods, hair, you name it. Had to take it out because it was causing irritation getting caught so frequently.
Was this helpful?
CC
Cords Club
2 months ago
Hi Danielle!

We're so glad you love the look of the marquise onyx stud - it really is a gorgeous piece! But we totally understand your frustration with the snagging issue. The prong setting does create those little edges that can catch on fabrics and hair, which is definitely not ideal for everyday comfort.

Our pieces are made for sensitive ears, and we are so sorry for the irritation. However, everyone's allergies are unique, and no two sensitive ears are alike. We test our metals and have an extremely high success rate for sensitive-ear approval; however, it sounds like these didn't work for yours. We're so sorry to hear that. Please contact our support team so we can help make this right for you by helping with a quick return of your pieces.

Thanks for taking the time to let us know about your experience!

JM with Cords Club
Becky W.
Verified Buyer
2 months ago
Rated 3 out of 5 stars
It was okay
I put this in my tragus piercing but had to take it out shorty (a couple of days) as it was hurting my ear and becoming sore. I have really sensitive ears and mostly on the earlobes but guess it’s with my tragus too. So I could have been user error and me being a dummy to think I could wear it there. It was so cute for the time tho!
Was this helpful?
CC
Cords Club
2 months ago
Hi Becky!

Thanks for the honest review and for giving it a try! We totally understand that sensitive ears can be tricky, especially with cartilage piercings like the tragus. It's definitely not user error on your part - everyone's ears are different, and what works for one person might not work for another. We're glad you thought it was cute for the time you could wear it, though! Please reach out to us at hello@cordsclub.com so we can sort this out.

JM with Cords Club
Alexandra R.
Verified Buyer
3 months ago
Rated 5 out of 5 stars
Beautiful
The earring looks delicate and beautiful
Was this helpful?
CC
Cords Club
3 months ago
Hi Alexandra!

Delicate and beautiful is exactly what we were going for with the Prong-Set Marquise! 🖤✨ The marquise cut really gives it that elegant, refined look while still keeping that gorgeous onyx drama we love so much. We're so thrilled it's hitting all the right notes for you — that delicate vibe paired with the stunning onyx is just chef's kiss perfect! Thanks for such a lovely review!

😘~ Elvie with Cords Club 🖤🎃