How to Tell Someone’s Ring Size: A Simple Guide

Mariah Brown

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Mariah Brown

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Are you thinking of popping the question, but unsure of your partner’s ring size? Don’t worry, we’ve got you covered! Finding out someone’s ring size may seem like a daunting task, but with a little bit of creativity and some stealthy detective work, you can easily discover this important piece of information without spoiling the surprise. In this guide, we’ll walk you through some ingenious methods and tips to help you determine the perfect ring size for your loved one, ensuring that heartfelt proposal goes off without a hitch.

how to tell someone’s ring size

1. Pay Attention to Their Jewelry Collection

If your partner already wears rings, pay close attention to the ones they frequently wear. When they remove their rings, take the opportunity to discreetly measure the internal diameter with a piece of paper or a string. This will give you an idea of their ring size, which you can then use as a reference when shopping for the perfect engagement ring.


  • Using a Piece of Paper

    Take a piece of paper and wrap it tightly around one of their rings. Mark the point where the paper overlaps, and measure the distance between the two marks using a ruler. Refer to a ring size chart to determine the corresponding size.

  • Using a String

    If you don’t have a piece of paper handy, a string can also be used to measure the circumference of an existing ring. Wrap the string around the ring, ensuring a snug fit, and mark the point where it overlaps. Measure the distance between the two marks and compare it to a ring size chart to find the appropriate size.

2. Seek Help from Friends or Family

If you’re close to your partner’s friends or family members, don’t hesitate to reach out and ask for their assistance. They may have valuable insights into your partner’s ring size, especially if they’ve been involved in discussions about engagement or wedding plans. Sworn to secrecy, they can discreetly help you by sharing the information you need.


  • Close Friends and Siblings

    Your partner’s close friends and siblings are more likely to have an idea about their ring size. Reach out to them, explain the situation, and ask for their help in finding out this crucial information. Remember to stress the importance of keeping it a secret!

3. Use a Ring Sizer

If you have access to one of your partner’s rings, a ring sizer can come in handy. These nifty devices are designed to accurately measure ring sizes, providing you with a foolproof way to determine the perfect fit. You can find ring sizers online or at jewelry stores.


  • Ring Sizer Instructions

    Slide the ring onto the sizer, ensuring a snug fit. Take note of the size indicated by the sizer and use it as a reference when shopping for the engagement ring. Keep in mind that different countries and regions may have slightly different sizing standards, so check if the ring sizer you’re using corresponds to the same standard.

4. Borrow a Ring

If you’re unable to get your hands on one of your partner’s rings, consider borrowing a ring they wear on a different finger. This can serve as a temporary placeholder to help you determine the approximate size. Just remember to return it promptly!


  • Measure the Inner Circumference

    With the borrowed ring, measure the inner circumference using a piece of string or a paper strip. Once you have the measurement, consult a ring size chart to estimate the appropriate size for your partner’s ring finger.

5. Enlist the Help of a Professional

If all else fails, don’t hesitate to seek assistance from a professional jeweler. These experts have years of experience in accurately determining ring sizes and can provide valuable guidance in selecting the perfect engagement ring for your partner.


  • Consulting a Jeweler

    Visit a reputable jeweler and explain your situation. They will have tools and techniques to accurately determine your partner’s ring size. Additionally, they can guide you through the process of choosing the right engagement ring, taking into account factors such as style, materials, and budget.

Table Breakdown

Method Pros Cons
Using an existing ring Accurate measurement May spoil the surprise
Seeking help from friends or family Insider knowledge Can be difficult to keep it a secret
Using a ring sizer Precise measurement Requires access to a ring
Borrowing a ring Temporary solution Must return the borrowed ring
Consulting a jeweler Professional guidance Additional cost


1. How can I measure someone’s ring size without them knowing?

To measure someone’s ring size without them knowing, you can borrow one of their rings and measure the inner circumference. Alternatively, check their jewelry collection for frequent ring choices and use a ring sizer or measuring method mentioned in this guide.

2. Are online ring size charts accurate?

Online ring size charts can serve as a useful reference, but they may not always be 100% accurate due to differences in resizing methods across different regions. If possible, consult a professional jeweler for the most precise measurement.

3. Can I resize an engagement ring if it doesn’t fit?

In most cases, engagement rings can be resized by jewelers if they don’t fit. However, resizing may have limitations depending on the design and materials used. It’s best to consult with a jeweler to determine if resizing is possible for your specific ring.

4. What if I choose the wrong ring size?

If you choose the wrong ring size, many jewelers offer resizing services. However, it’s always best to ensure you have the correct size before making a purchase to avoid any additional hassle or costs.

5. Should I choose a slightly larger or smaller ring if I’m unsure of the size?

If you’re unsure of the size, it’s generally safer to choose a slightly larger ring. It’s easier to resize a ring to make it smaller than to make it larger. Remember, an engagement ring should fit comfortably but not be too loose.


Now that you’re armed with ingenious techniques for determining someone’s ring size, you can confidently embark on your quest for the perfect engagement ring. Whether you opt for discreet measurements using existing rings, seek assistance from friends and family, or consult a professional jeweler, you’re one step closer to creating a memorable and magical proposal. Keep in mind that these methods are meant to be helpful guidelines, and in the end, the most important thing is the love and commitment you share with your partner. Happy ring shopping!

If you found this guide helpful, be sure to check out our other articles filled with inspiration and tips for planning the perfect wedding.

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