Skip to content

Country

Cart - Items are not reserved until payment

Your cart is empty

Luxury Packaging with Every Order

Luxury Packaging with Every Order

Every order arrives beautifully presented with our luxury packaging:

A signature velvet pouch designed to protect your jewellery and be kept forever

A Promise Card ready for you to write your own special promise, to a loved one, a friend... yourself!

Thoughtful. Gift-ready. Worth paying for but included free.

Delivery & Shipping

Delivery

Delivery & Shipping

Orders are shipped Monday–Friday.

Any orders placed after 1pm (MST) on Friday will not be shipped until Monday.

UK Shipping (from our UK warehouse)

Royal Mail 48 Hours: Delivery in 2 working days.

Royal Mail 24 Hours: Delivery in 1 working day (order before 1pm GMT to receive your parcel the next working day).

USA Shipping (from our USA warehouse)

Orders ship via DHL Express Domestic. Delivery takes 1–4 working days, depending on your shipping zone.

All tariffs and import fees are already covered by The Promise Ring Co. LTD, so there are no additional customs charges for US customers.

International Shipping (all other countries from our UK warehouse)

Europe: 2–11 business days.

Rest of the World (Canada, Australia, etc.): 3–17 business days.

Please note: Delivery times are estimates and may occasionally be extended due to customs delays, courier disruptions, or UK bank holidays.

Our Size Guide

Our Size Guide

Not sure on your sizing? Need to secretly measure for a loved one? Find our handy printable PDF.

US/Promise Co Diameter (mm) Circumference (mm) UK Europe
2 13.3 41.7 D ½ 42
3 14.1 44.2 F ½ 44
4 14.9 46.8 H ½ 47
5 15.7 49.3 J ½ 49.3
6 16.5 51.9 L ½ 51.9
7 17.3 54.5 N ½ 54.4
8 18.1 57 P ½ 57
9 18.9 59.5 R ½ 59.5
10 19.8 62.1 T ½ 62.1
11 20.6 64.6 V ½ 64.6
12 21.4 67.2 X ½ 67.2
13 22.2 70 Z ½ 70

Custom Promise Rings

Create a custom promise ring that tells your story.

With meaningful stones, colors and finishes chosen for the person, moment and promise behind it.

Step 1Choose a design to make your own
Step 2Select precious metal & size
Step 3Choose your stones & engraving
Made For youOur master jewellers hand-set your piece

Sort by

7 products

Hidden Birthstones
oval animation frameoval animation frameoval animation frameoval animation frame
Engravable Oval Promise Ring Sale price$272.00
Custom Marquise Engraved Band Promise Ring Sale price$272.00
toi-et-moi animation frametoi-et-moi animation frame
Custom Toi et Moi Ring Sale price$262.00
Viral Pinky Ring
heirloom animation frameheirloom animation frameheirloom animation frameheirloom animation frameheirloom animation frameheirloom animation frameheirloom animation frame
Promise Heirloom Birthstone Ring Sale price$282.00
Up to 3 Birthstones
pave animation framepave animation framepave animation frame
Custom Pave Birthstone Ring Sale price$152.00
curve animation framecurve animation framecurve animation framecurve animation frame
Custom Curve East West Pear Ring Sale price$210.00
slim-signet animation frameslim-signet animation frame
Slim Signet Ring - Engravable Sale price$233.00

Our BirthStones

  • Garnet birthstone

    Garnet

    January

  • Amethyst birthstone

    Amethyst

    February

  • Aquamarine birthstone

    Aquamarine

    March

  • Diamond Simulant birthstone

    Diamond Simulant

    April

  • Emerald birthstone

    Emerald

    May

  • Lavender birthstone

    Lavender

    June

  • Ruby birthstone

    Ruby

    July

  • Apple Green birthstone

    Apple Green

    August

  • Sapphire Blue birthstone

    Sapphire Blue

    September

  • Pink birthstone

    Pink

    October

  • Champagne birthstone

    Champagne

    November

  • Tanzanite birthstone

    Tanzanite

    December

Custom Promise Rings Made for Your Story

A custom promise ring turns a meaningful commitment into something that feels connected to the people making it. Instead of choosing a ring simply because it looks beautiful, you can select details that represent a person, date, memory or shared part of your story.

Your ring might feature a birthstone connected to someone special, a color that holds personal meaning or two stones representing two people.

At The Promise Co, the promise always comes first.

Our personalized promise rings are designed to help you create something meaningful without placing rules or expectations around what that promise should mean.

Create a Custom Promise Ring for Her

For a romantic look, consider soft shapes or meaningful colors or even a two-stone setting. For someone who prefers minimal jewelry, choose a delicate band or understated design that can become part of her everyday collection.

A personalized promise ring for a girlfriend or partner can mark a first anniversary, a shared milestone, a long distance relationship or a commitment to the future.

The most important part is not how large or elaborate the ring is. It is the thought behind the details you choose.