How to Find Your Partner's Ring Size: Mission (Not) Impossible

Are you on the hunt for the perfect engagement ring but need to know your partner's ring size first? We understand that finding out their size can be a daunting task, especially if you want to keep it a surprise. But fear not! We’ve pulled together some tips and tricks to get your partner’s ring size without giving the game away!

First things first, it’s important to note that we use UK ring sizes for our rings, ranging from D to Z+6. An average size for the UK is an N, but a small average size is around an I or J, and a slightly larger (but still common) size is around a P or Q. After you’ve managed to sleuth your way to your partner’s ring size, if you think they’re in between sizes, just let us know! We offer half sizes if that’s going to be the perfect fit.

We can convert US and Japanese ring sizes to UK sizes, so our international guests don't need to worry about finding their size.

borrow one of their rings

If you're unsure of your partner's ring size, one of the easiest ways to find out is to "borrow" one of their rings for a short period of time. But make sure to choose a ring they wear on their right hand ring finger and one that they don't wear every day to avoid raising suspicion.

Once you've secured the ring, you have a few options for finding out their ring size without them knowing. You can order one of our ring sizers, which will arrive in discreet packaging through your letterbox. Compare your partner's ring to the different sizes provided, and choose whichever one is the closest in diameter. Apart from using the ring sizer on your partner’s actual ring finger, this will be the most accurate method.

Another option is to trace around the inner circle of the ring using a pencil to avoid leaving any marks on the ring. Compare this to the sizes on the ring sizer and determine which size is the closest. Alternatively, you could pop the traced circle into your local jeweller and ask them to advise which ring size they would suggest.

If you can manage to sneak your partner’s ring away for a longer period of time, you can pop into your local jewellers and ask them to size it. Just remember, opinions on ring size can differ from jeweller to jeweller, and will be based on the shank width and type they use for their stock, so the recommended size may not be the same at every jeweller.

bring in the cavalry

If you can, we would recommend enlisting the help of family or friends. A friend could suggest a fun shopping day that includes trying on pretty rings. Not only will this help you gain knowledge of their ring size, but it may also expose your partner's preference of ring design and gems.

use our ring size guide

We’ve created a ring size guide (find it here), which you can use on your phone with your partner’s ring to determine their ring size! Simply zoom in until the outer line is the same size as a credit card (lay your card on top of your phone screen), and then lay your partner’s ring on top of each ring size until you find the right one! This should get the correct size within a 2-3 size range.

If all else fails, you can always speak to us about your partner's overall measurements, and we may be able to help you estimate their ring size.

It's also good to know that we offer a half-price resizing service within the first three months of purchasing. Rings with stones on their shoulders are harder to resize, so we encourage you to order a ring sizer before purchasing. Thinner bands have a looser fit, so if you're finding out your partner's ring size using one of their own rings, make sure it's of a similar width to the ring you intend on purchasing.

We hope this helps you on your covert mission to find out your partner's ring size. Remember, we're here to help you every step of the way. Don't hesitate to reach out to us if you have any questions or concerns.

things to avoid when trying to find their ring size in secret

Tie a piece of string around their finger while they’re asleep. This will not be an accurate representation of their finger size, and they might be mad at you if you wake them up!

Using a ring they wear on their middle or index finger or thumb to determine their ring finger size - the majority of people don’t wear rings on their ring finger until it’s an engagement ring, so be wary that the ring you’re taking the size from may be bigger/smaller than you need. Take notice of which finger they wear each ring on, and let us know if it’s the only ring you can get your hands on!

Use a cable tie style ring sizer. These ring sizers are very often not accurate, as they are most likely broader than the ring you are purchasing, as well as being bulky and not ideal for sizing correctly. We beg you, don’t use one of these!