HOW TO FIND THEIR RING SIZE WITHOUT RUINING THE SURPRISE
A perfect proposal is all about the moment - but the details matter too. One of the trickiest? Getting the ring size right without tipping them off.
If you’re wondering how to find their ring size secretly , you’re not alone. It’s one of the most common concerns for people planning a surprise engagement. The good news? There are clever ways to figure it out - without spoiling the surprise.
Here’s how to do it discreetly and confidently.
1. Borrow a Ring They Already Wear
If your partner wears rings regularly, borrow one they wear on their ring finger – ideally the left hand. Take it to a jeweller for a professional sizing, or use a ring sizer tool or printable guide at home.
Pro tip: Can’t take the ring out of the house? Press it into a bar of soap or clay to make an impression, or trace the inner and outer edge onto paper.
2. Try the Paper Trick While They Sleep
For deep sleepers, you can gently wrap a thin strip of paper or string around their ring finger while they sleep. Mark where it overlaps, measure it with a ruler, and compare the length to a ring size chart.
This works best if you’re confident and they don’t wake easily.
3. Photograph or Trace One of Their Rings
If borrowing a ring isn’t an option, take a photo of it next to a coin or ruler to scale. Or, trace the inside edge onto paper when they’re not around.
Bring your photo or sketch into a showroom – or use it to compare against our online sizing tools.
4. Ask Their Family or Friends (Discreetly)
A close friend or sibling may already know – or could ask naturally in conversation without raising suspicion. Just make sure it’s someone who can keep a secret!
5. Take Your Best Guess – Then Resize Later
If you’re really stuck, don’t worry. Most people wear a size L, M, or N (UK sizing), so guessing within that range is a good start.
At Fraser Hart, we offer resizing on most engagement rings, so you’ll never be stuck with the wrong fit.
Bonus: Use the Rings They Do Wear
If your partner wears rings on their middle or index finger, take note. A skilled jeweller can estimate the right size for the ring finger based on that info – and even adjust slightly for left or right hand differences.
Found the Size? Now Find the Ring.
Fraser Hart’s Ring Size Support
We’re here to help make your proposal moment feel effortless.
• Printable ring size guides for discreet at-home measuring
• Expert in-store support from our experienced jewellers
• Comprehensive ring resizing guide to help you plan with confidence
• Lifetime Diamond Promise for peace of mind that lasts
Still unsure? Start with the ring you love most. We’ll take care of the rest.