Heart Lock Flat Back Stud

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!

Sleep-Friendly

Hypoallergenic

Waterproof

DESCRIPTION

A little love, a little mystery. The Heart Lock Flat Back Stud is giving secret notes, diary keys, and nostalgia vibes. It might just be the key to your dream stack.

A Cords Club exclusive, we designed this flat back stud from scratch. We spent months perfecting the size, weight, and amber color of this gorgeous design!

This listing is for a single ASTM F136 implant grade titanium push-pin flat back stud.

Measurements:

18 GA (1mm)
Post is 1/4 inch (6mm) in length, with a 4mm disc on back. 
Approx. size of shape is 3.5x5.5mm. 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 Titanium, Titanium

Care: Water and tarnish proof with proper care. If exposed to salt water, chlorine, or lotions/perfumes, rinse off with cool 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

4.9

Rated 4.9 out of 5 stars

Based on 21 reviews

100%would recommend this product

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21 reviews

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Lisa P.
Verified Buyer
Yesterday
Rated 5 out of 5 stars
These are so adorable
I absolutely love these earrings. I’m a silver girly and was afraid they wouldn’t look as cute as gold due to the product photos. The silver ones are just as cute and I wear these everyday!
Was this helpful?
CC
Cords Club
21 seconds ago
Hi Lisa!
So happy to hear you're loving your Heart Lock Flat Backs 🌸✨ We love that the silver ones turned out to be just as adorable as you hoped—and that they've become your everyday go-to is the sweetest compliment 💌
—🌿 Jace with Cords Club
Emily S.
Verified Buyer
1 month ago
Rated 5 out of 5 stars
Cute with the Key To My Heart Stud!
Super cute paired with the Key To My Heart Flat Back Stud! Note, however, that the 6mm post that comes with the stud did not fit all the way through my 7yo’s average sized lobe.
Was this helpful?
CC
Cords Club
1 month ago
Hi Emily,

Thank you so much for sharing your feedback on the Heart Lock Flat Back Stud! We're so glad you love how cute it looks paired with the Key To My Heart stud.

We appreciate you letting us know about the fit issue with the 6mm post and your daughter's lobe. We'd love to help make sure she can wear this adorable piece comfortably. Please reach out to our customer support team at hello@cordsclub.com so we can take a closer look and find the best solution for you.

We really appreciate you taking the time to share your thoughts with us!

JM with Cords Club
Ashley F.
Verified Buyer
1 month ago
Rated 5 out of 5 stars
Heart lock
Got this to go with my key it's a perfect combo!
Was this helpful?
CC
Cords Club
1 month ago
Hi Ashley! 🔐💙
That's such a perfect pairing! We love that the Heart Lock Flat Back Stud works so beautifully with your key—it sounds like such a cute combo. ✨ Thank you so much for the amazing review, we're thrilled you're obsessed!
—🌺🌱 Jace with Cords Club
Amanda C.
Verified Buyer
2 months ago
Rated 4 out of 5 stars
Junk drawer treasure
Love the whole collection and this is perfect paired with the Victorian skeleton key
Was this helpful?
CC
Cords Club
2 months ago
Hi Amanda!
Yes! The Heart Lock paired with the Victorian skeleton key is such a dreamy combination ✨🔑💖! There's something so magical about pieces that tell a story together, and those two are absolutely perfect for creating that vintage treasure vibe 🌟.
—🌿☀️ Jace with Cords Club
Courtney S.
Verified Buyer
6 months ago
Rated 4 out of 5 stars
Cute but wants to be upside down
Cute but flips upside down a lot.
Was this helpful?
CC
Cords Club
6 months ago
Hi Courtney! 😊

We're so glad you think the Heart Lock Flat Back Stud is cute! ✨ We totally get the frustration with it wanting to flip upside down though — that can be really annoying when you want it to sit just right! 😭 The heart shape can sometimes make it a bit top-heavy, which might be causing the flipping issue. We really appreciate you sharing this feedback because it helps us understand how the design performs in real life! It sounds like you're still loving the overall look despite the positioning quirk, which is awesome! Thanks for the honest review about how it wears!

JM with Cords Club