Secret Agent Love: How to Stealthily Find Out Your Partner’s Ring Size

If subtlety isn’t your strongest suit, then mastering the art of the unexpected proposal will come as no easy task. And let’s not forget the ultimate threat to your discretion, that is, figuring out the size of your future fiancé’s ring finger. There’s nothing worse than having the perfect proposal planned out with the perfect ring, only to discover that on the day of, your partner won’t be showing off her new rock.

But fear not. We jewelers have a few tricks up our sleeves, and a little secret mission is half the fun. But despite your utmost efforts, there’s still a chance you’ll need to come back for a few touch-ups to achieve the perfect fit. If that’s the case, don’t be disheartened. If it’s wearable on the day, you’ll know you’ve done a pretty good job!

Here are some stealthy strategies for sizing up a ring finger on the sly:

  1. Borrow from their jewelry box.

It may be one of the oldest tricks in the books, but finding a ring they already wear is the ultimate! It’s essential you take note of the finger/hand your partner wears said ring on (fingers on the dominant hand can easily be a half size or full size larger on average). Once you’ve whittled down all the variables, do some detective work to find out whether or not the ring they currently wear is a good fit. For instance, is it firm—or do they slip it on and off with ease?

  1. Draw a line where their ring sits on your own finger.

If you can’t get the ring away from them, it’s a good idea to try it on one of your own fingers, drawing a line with a pen where the base of the ring sits. If you can’t take it in to your jeweler right away, simply take a photo of the line on your finger.

  1. Check for sizing stamps inside their ring.

If you’re lucky, certain brands your partner might wear (like Pandora) come with the sizing stamped on the inside. Piece of cake!

  1. Enlist some accomplices (like their family)

But if sizing up a diamond for their digit is proving to be a difficult assignment, it might be worth asking their siblings, parents or best friends to do some of the detective work for you. Make sure you confide in people who can be trusted. Not to mention those who won’t have a hard time putting on their best poker face prior to you popping the question.

  1. Take a photo of their ring next to a ruler.

Line the side profile of the ring up with a ruler and take a photo. Or, if time is on your side, use a fine pen to trace around the inside and outside of the ring on a piece of paper.

Now that you have these secret agent strategies in your arsenal, you can confidently embark on your mission to determine your partner’s ring size without arousing suspicion. Happy sleuthing!

Borrow from their jewelry box.

If you’re on a top-secret mission to figure out your partner’s ring size, borrowing from their jewelry box can be a sneaky yet effective tactic. By observing the finger or hand they wear a ring on and assessing if the ring they wear is a good fit, you can gather valuable clues without raising any suspicions.

Note the finger/hand they wear the ring on

Observe which finger or hand your partner consistently wears a ring on. Typically, engagement rings are worn on the ring finger of the left hand, but this can vary depending on cultural or personal preferences. By paying attention to the specific finger or hand they choose, you can narrow down the possibilities and gain insight into their ring size.

Assess if the ring they wear is a good fit.

Take a closer look at the ring your partner regularly wears. Does it seem to fit comfortably on their finger, or does it appear loose or tight? If the ring seems snug, it might indicate a smaller size, while a loose fit may suggest a larger size. Keep in mind that some individuals may intentionally wear rings that don’t fit perfectly, so use this method as a starting point rather than a definitive answer.

Remember, borrowing from their jewelry box requires utmost stealth. Be careful not to arouse suspicion and quickly return the ring to its rightful place. This clever tactic can provide you with valuable information to help you in your quest for the perfect ring size without your partner ever suspecting a thing.

Draw a line where their ring sits on your own finger.

If you can’t get the ring away from your partner, it’s a good idea to try it on one of your own fingers. Simply wear the ring and note where the base of the ring sits. To make it even easier, use a pen to draw a line on your finger at the same spot. This will give you a visual reference of the size.

To ensure accuracy, take a photo of the line on your finger. This way, you can easily show the image to a jeweler when you’re ready to find the perfect ring size. Remember, the objective is to be stealthy, so make sure to delete the photo after use to keep it a secret.

Check for sizing stamps inside their ring

Finding out your partner’s ring size without them suspecting can be a challenge but fear not! There are stealthy strategies you can employ to gather the necessary information. One of these tactics involves checking for sizing stamps inside their ring. Here’s how you can go about it:

1. Observe the inside of the ring

Take a close look at the inside of the ring your partner currently wears. Some brands, like Pandora, often include sizing information stamped on the inside of their rings. This sizing stamp can indicate the ring size, making your task a whole lot easier.

2. Use a magnifying tool

If the sizing stamp is too small to read with the naked eye, you can use a magnifying tool, such as a jeweler’s loupe, to get a clearer view. This tool will help you identify any numbers or letters that indicate the ring size.

3. Take a photo for reference

If the ring has a sizing stamp, take a photo of it for future reference. This way, you’ll have a visual record of the sizing information, allowing you to accurately determine your partner’s ring size when you’re ready to make a purchase.

4. Seek professional assistance

If you’re unsure about the sizing stamp or need additional guidance, consult with a reputable jeweler. They have experience and expertise in determining ring sizes and can help you interpret any markings or engravings inside the ring.

Remember, accuracy is key when it comes to ring sizing. While looking for sizing stamps inside their ring can be helpful, it’s always a good idea to combine this method with other tactics to ensure you obtain the most accurate measurement possible.

Stay tuned for more creative ways to stealthily find out your partner’s ring size in the upcoming sections of this article.

Enlist Some Accomplices (Like Their Family)

In your quest to stealthily find out your partner’s ring size, one of the best resources you can tap into is their family. By enlisting trusted family members as accomplices, you can gather valuable information and increase your chances of getting the right ring size without giving away your intentions. Here are a few steps to follow when seeking assistance from your partner’s family:

Ask Trusted Family Members or Friends for Help

Approach close family members or friends who you know your partner trusts and has a good relationship with. These individuals are more likely to have insider knowledge about your partner’s preferences and details that can help you determine their ring size. It could be a sibling, parent, or even a best friend.

When reaching out to these trusted accomplices, it’s essential to explain your intentions clearly and emphasize the need for secrecy. Assure them that you are planning a surprise and want to keep everything under wraps to make the moment special for your partner. Remember to choose individuals who are discreet and reliable, ensuring that they won’t accidentally spill the beans.

Make Sure They Can Keep a Secret

Ensuring the ring size mission remains covert is crucial. Before sharing any information, have an honest conversation with your partner’s family members or friends about the importance of maintaining secrecy. Stress the significance of surprise and the joy it will bring to your partner when they receive the perfectly fitting ring.

Establish a mutual understanding and trust that they won’t unintentionally reveal any hints or details to your partner. Make it clear that their role as an accomplice requires discretion and confidentiality throughout the entire process.

Enlisting these accomplices can greatly assist you in discovering your partner’s ring size without raising any suspicions. Remember to express your gratitude and appreciation for their collaboration in making your surprise proposal even more memorable.

Take a photo of their ring next to a ruler.

Estimating the ring size of your partner can be a challenging task when you need to keep it a secret. One technique that can help you get an accurate idea of their ring size is by taking a photo of their ring next to a ruler. This method allows for a visual comparison that can provide valuable insights. Here’s how to go about it:

Line up the ring with a ruler for size estimation

  1. Choose a suitable ruler: Find a ruler with clear markings and a size range that can accommodate the size of the ring. A ruler with millimeter markings is ideal for better precision.
  2. Place the ring next to the ruler: Lay the ring flat on a clean surface and line up one side of the ring with the beginning of the ruler.
  3. Align the ruler: Make sure the ruler is parallel to the ring, running along the side profile of the ring.
  4. Take a clear photo: Use your smartphone or camera to capture a close-up photo of the ring and the ruler, ensuring that both are in focus and the measurements are clearly visible.
  5. Review the photo: After taking the photo, zoom in to examine the alignment between the ring and the ruler. Pay attention to the point where the inside of the ring meets the ruler markings.
  6. Estimate the size: Compare the measurement on the ruler to the point where the inside edge of the ring aligns. Take note of the closest measurement, which can serve as an estimate of the ring size.

Remember that this method provides an estimation and may not be completely accurate. It is essential to consider the width of the ring band and any variations in finger size. If possible, use this method alongside other techniques to ensure a more precise measurement.

Taking a photo of the ring next to a ruler is a discreet and helpful way to gauge your partner’s ring size without raising suspicions. It allows you to visually assess the size and make an informed decision when selecting or resizing a ring for your surprise proposal.


In the world of secret agent love, finding out your partner’s ring size can be a daunting mission. But fear not, there are stealthy strategies to help you accomplish this task. From borrowing a ring from their jewelry box to checking for sizing stamps inside their ring, there are various methods to gather the necessary information without arousing suspicion. Enlisting the help of accomplices, such as their family, can also prove beneficial. And if all else fails, taking a photo of their ring next to a ruler can provide a helpful reference. Remember, even if you need to make adjustments later, as long as the ring is wearable on the day, you’ve done a pretty good job. So, embrace the adventure and enjoy the excitement of the unexpected proposal.

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