Our Size Guide
Not sure of their ring size? Don't worry - we've made it easy.
Use our printable size guide below and simply place one of their existing rings over the circles to find the closest match. All our rings use standard US sizing - if you don't know your US size, you'll find an easy table below.
Women's rings are available in US sizes 3-10, and men's rings in US sizes 8-13.
| US/Promise Co | Diameter (mm) | Circumference (mm) | UK | Europe |
|---|---|---|---|---|
| 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 |
Still Not Sure?
Use our handy printable PDF to help you find your ring size
Sizing & Support
You can now use our printable ring size guide - simply place a ring you already own on top to find the match. If you don’t have one, a standard ring sizer (the keychain-style with metal loops) works perfectly too.
Once you’ve got your size, use our guide below to convert it, or just drop us an email and we’ll support at info@thepromiseco.com
We have a great gift guide for her and gift guide for him where you can shop our most gifted pieces edit.
If you need personalised support on picking the perfect ring, email our team at info@thepromiseco.com and we will do our best to support.
At The Promise Ring Co. we are committed to providing you with
exceptional service and ensuring that your purchase of your ring is a truly special and sentimental experience. We understand that these pieces aren't just jewellery; they are symbols of love, commitment, and cherished moments.
That's why we stand by our products and offer a 5-year guarantee to give you peace of mind.
For full warranty terms click here
We understand accidents happen and we know how precious all our pieces are to each customer.
Email us a picture of the damage to info@thepromiseco.com and we will do our best to support you with solutions
Discover
How to make your promise:
CHOOSE A RING
Every order comes with a Promise Card, your space to write down your words and make your promise real
WRITE IT DOWN
Choose a one of our Pieces to signify your Promise. This could be a Promise to yourself, a friend Or loved one.
MAKE IT OFFICIAL
Post your promise to Promise World... where your words live alongside others, each one part of something bigger
