How to find out your partners ring size without them knowing

This is one of the most frequently asked questions by our customers, so we’ve put together some of the best tips and tricks…

How to guess your partners ring size

To begin with, take a look at the main tactics below…

  • Request a free sizer
  • Have him/her try on a ring that you’re pretending to buy for a family member
  • Ask one of his/her friends
  • Borrow one of his/her rings and take it to a jeweller
  • Trace one of his/her rings on a piece of paper and take it to a jeweller
  • Have him/her try one of her friends rings on
  • Compare your finger size to his/hers
  • Ask him/her

Find out your finger size

Request a ring sizer

Most jewellers or jewellery retailers can provide ring sizers so you can easily measure your ring size at home.

Be subtle

If you are set on a surprise proposal, but you still want to know the correct ring size, then you could try asking your partner in a subtle way. You could pretend that you’re buying a ring for a friend or family member, so make sure that the pretend recipient is someone whose hands are similar in size to your partner. You could casually ask them what their ring size is for your reference.

Ask their friends

A good way to find out their ring size is to ask one of their friends, they sometimes will have a better insight. If their friend doesn’t know straight away, they could be the one to find out the information. You could ask the friend to take your partner ring shopping and then report back to you with ideas.

Borrow one of their rings

You could try and borrow one of the rings they have, but be careful how you do this as it could backfire. Try and borrow a ring that they wear on a similarly sized finger, even if you can’t do this, you can usually come up with a close approximation of what size her/his ring finger will be. If you choose this option then make sure that you choose a ring which isn’t overly important and they won’t notice that it’s gone missing.

Trace the size of the ring

If you’re worried you may lose the borrowed ring, not to worry, you could trace the ring on some paper and the diameter can be worked out from the sketch.

Get help from a friend

Should one of your partner’s friends be engaged, simply ask her friend to let your partner try on the ring, this could give you a range size to start out with. This is also a great opportunity to ask what they think of their friends ring.

Compare your fingers

This may be a bit more difficult, but desperate times call for desperate measures, when you’re holding their hand, you could see if one of their fingers is the same size as yours. This method isn’t amazingly accurate but the more information you can get, the better.


Sometimes you just want to forget about doing things the hard way and take the straightforward route, if you and your partner have been discussing marriage for some time, then you could ask them outright what their ring size is.


The most accurate way to confirm your ring size includes having their ring sized by a jeweller in person. Using the methods above can still provide a good approximation, so don’t worry.

Custom engagement rings from Aurum Jewellers

When it comes to designing a bespoke engagement ring, it’s important that you consider having your partner come in and have their finger sized properly.

Engagement ring facts

  • Your dominant hand tends to be slightly bigger than the other hand
  • Wider rings have a tighter fit than thinner bands, so this also needs to be considered when it comes to finding out a ring size



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