How to Secretly Get Ring Size for a Surprise Proposal

How to Find Out Someone’s Ring Size Without Asking Them

So, you’ve decided to take the plunge and propose! It’s an incredibly exciting milestone. One of the key elements of any proposal is the ring, and determining the correct size can be challenging, especially when you want to maintain an element of surprise. The ideal engagement ring needs to be just right—snug enough not to fall off during a brisk walk, but loose enough to glide over the knuckle. If you’re aiming for that cinematic "perfect fit" moment, here are five covert strategies to get the measurement you need while keeping your plans under wraps.

1. Borrow a Ring

This is the gold standard of ring-size sleuthing. To do this correctly, you need to be observant. Pay attention to the rings your partner wears on their left-hand ring finger. When they leave it on the nightstand or take it off to shower, you have your window of opportunity.

  • The Trace: Place the ring on a piece of paper and carefully draw a circle around the inside of the band. Do this a few times to ensure accuracy.
  • The Impression: Press the ring into a bar of soap or a piece of playdough to create a physical mold.
  • The Professional Route: If you can sneak the ring out of the house for an hour, take it straight to a local jeweler. They can use a mandrel to give you an exact size in seconds.

2. Enlist Friends or Family Members

Sometimes, you need a boots-on-the-ground ally. Reach out to your partner’s best friend, mother, or sister. There’s a high probability they already know the size, or they can easily find out through a "casual" conversation that would seem suspicious coming from you.

Pro-tip: Only enlist someone you trust implicitly to keep a secret. The more people who know, the higher the chance the surprise gets leaked!

3. Gift a Ring for Another Occasion 

If you have a birthday or anniversary coming up before the big proposal, use it to your advantage. Tell your partner you want to buy them a "fun" ring or a piece of costume jewelry.

You can take them to a jewelry store under the guise of looking at watches or earrings, then pivot to the ring counter. Pay close attention to which finger they get measured for and what the jeweler says. You’ll walk away with the exact specs you need for the real ring later.

This approach not only reveals their precise ring size but could also help you understand their jewelry style when it comes time to pick out an engagement ring.

4. Team Up with an Engaged Friend

Do you have a friend who recently got engaged? Use their new sparkler as a prop. During a double date or a hangout, have your friend suggest that your partner "just try it on to see how it looks."

  • A general size range for reference
  • Potential direct disclosure of your partner’s ring size if the friend’s ring doesn’t fit properly
  • Valuable insights into your partner’s preferences regarding  ring style  and design

Watch closely: Does it slide right on? Is it way too big? Does it get stuck at the knuckle? If you know the friend’s ring size, you can use their finger as a benchmark to estimate your partner's size.

This scenario appears completely natural while uncovering important information for your proposal planning.

5. Get a Temporary Setting 

If you’ve tried everything and you’re still second-guessing yourself, don't panic. Many modern jewelers offer "Temporary Settings." This allows you to purchase the diamond or gemstone first and set it in a simple, classic band for the proposal.

After they say "Yes!", you can return to the jeweler together to choose the final setting and get a professional fitting. It removes the stress of sizing and ensures your partner gets the exact design they want.

7 Tips for Secretly Getting Ring Size

  1. Don’t borrow a random ring: Finger sizes vary considerably, so ensure you borrow a ring specifically worn on the left ring finger for accurate sizing.
  2. Don’t borrow a frequently worn favorite: Select a ring your partner won’t immediately notice is missing from their collection.
  3. Maintain subtlety: Avoid direct questions about ring size or showing sudden interest in their jewelry habits.
  4. Limit confidants: While strategic assistance is valuable, involving too many people increases the risk of compromising your surprise.
  5. Don’t behave unusually: Maintain natural behavior to prevent your partner from becoming suspicious.
  6. Keep methods straightforward: While being resourceful is important, overcomplicating things can lead to unnecessary stress and confusion. Stick to simple and discreet methods.
  7. Verify measurements: Double-check your measurements to ensure accuracy. It is much easier for a jeweler to "size down" a ring (make it smaller) than it is to add metal to make it larger. Better safe than sorry!

You Got This!

Remember, the most important thing is the sentiment behind the proposal, so try not to stress too much. You’re already well on your way to pulling off the perfect surprise proposal!

Looking for more information? Find our free ring sizer, printable ring size chart, tips, and step-by-step methods to help you find the perfect ring size  here.