How to Find Your Girlfriend’s Ring Size | Perfect Proposal

The perfect engagement ring is more than just a beautiful diamond—it’s a symbol of your love story. But let’s face it: finding the right ring size while keeping the proposal a surprise can feel like mission impossible. Don’t worry, though. With a little creativity, some insider tips, and a pinch of help from us at Diamond Ateliers, you’ll be well on your way to presenting her with a ring that fits like a dream.

The Secret to Ring Sizing: How It’s Done

Before we get into the sneaky stuff, let’s talk about how ring sizes are measured the right way.

Ring sizes are based on the circumference of the finger, and jewelers use tools like sizing rings and mandrels to ensure accuracy. When we measure a client’s size at Diamond Ateliers, we also consider comfort. A diamond ring that’s too snug can be uncomfortable, and one that’s too loose could slip off at the worst possible time (think washing dishes or, heaven forbid, during a proposal surprise!). For more details, check out our ring sizing guide!

Since bringing your girlfriend to the diamond shop would ruin the surprise, using simple at-home methods to estimate her size is a smart way to prepare. Techniques like the string or paper method can work well enough to get the ring ready for the big moment, especially when paired with the reassurance of lifetime free resizing services. See what our founder Don has to say for it.

With our support, even if the size isn’t perfect at first, you’ll still have the perfect ring for your unforgettable proposal. Read further to find different ways to estimate their ring sizes!

Keeping the Proposal a Surprise

We know your engagement is a big deal, and you want every detail—down to the fit of her diamond ring—to be perfect. But keeping the proposal a surprise means you’ll need to be a little sneaky.

First, breathe easy. If the size isn’t perfect the first time, it’s not the end of the world. Diamond Ateliers offers lifetime free resizing for all our rings, so you can rest assured that we’ve got you covered.

That said, here are some clever ways to uncover her size without tipping her off.

Sneaky Ways to Find Her Ring Size

Use Her Height and Weight as a Guide

Believe it or not, jewelers like us can make a reasonable estimate based on her height and weight. While this isn’t the most precise method, it’s a solid starting point if you’re completely in the dark. Here’s a general guide to give you an idea:

• Petite Build (Under 160 cm and under 55 kg)
  Likely ring size: 4–5.5
• Average Build (160–170 cm and 55–68 kg)
  Likely ring size: 5.5–7
• Taller or Curvier Build (Over 170 cm or over 68 kg)
  Likely ring size: 7–9

Keep in mind, this is just a rough estimate. Finger sizes can vary significantly, even among people of similar height and weight. If you use this method, it’s always a good idea to combine it with other techniques, like borrowing a ring or asking her close friends, to ensure a better fit. Plus, our resizing services are always available to make adjustments after the surprise!

Try the String Method

Feeling brave? Wait for a moment when she’s not paying attention, like during a cozy movie night, and gently wrap a piece of string around her ring finger. Mark the point where the string meets, and bring it to us. We’ll translate it into her ring size. Sneaky, right?

Ask Her Sister or Close Friend

If your girlfriend has a sister or a close friend, they can be your secret agents. Enlist their help to casually ask about her ring size or even borrow one of her rings. Just make sure they don’t let the surprise slip! This method has worked wonders for some of our clients, and we’ve seen it in action firsthand.

One of our happy clients, Shafik, used this trick to perfection. He enlisted the help of his girlfriend’s cousins, who were happy to play along. They pretended to be ring shopping and casually asked his girlfriend (now wife) to try on a few rings. Once they had the size, Shafik passed it along to us, and we were able to create the perfect engagement ring without her ever suspecting a thing.

Here’s what Shafik had to say about it: “I’m not a sneaky guy, and I’m super transparent. So I got her cousins to pretend they were interested in buying rings and had them get my girlfriend to try some on. Then I passed the size to Don at Diamond Ateliers, and he sorted me out!”

Shafik couldn’t have been happier with the result: “No resizing needed for either the wedding or engagement rings! Diamond Ateliers nailed it.” It just goes to show how a little help from the right people can make the process easier—and still keep the surprise intact!

Borrow an Existing Ring

Speaking of borrowing, this is one of the easiest ways to get her size—if she already owns a ring she wears on her ring finger. Swipe it when she’s not looking (but make sure you return it quickly!) and bring it to us for measurement. Bonus points if it’s a ring she doesn’t wear often, so she won’t notice it’s missing.

Reach Out to Us for Help

Finding the perfect diamond ring doesn’t have to be stressful. At Diamond Ateliers, we’re here to make the process as seamless as possible. Not only do we offer lifetime free ring sizing, but we’re also happy to share advice on everything from proposal ideas to customizing your engagement ring.

If you’re ready to create something truly one-of-a-kind, check out our article on considerations when customizing your engagement ring and our ring setting & style guide for tips on creating the perfect setting. And if you need help with ring sizing—or just a little moral support—we’re only a call or visit away. In fact, you can even see a discussion between two of our jewelers, Ed and Don, as they talk about the relationships they’ve built with their customers over the years.

At Diamond Ateliers, it’s not just about creating a beautiful diamond ring; it’s about understanding the personal journey behind every proposal surprise. Ed and Don share how they’ve been part of so many memorable moments, from helping with ring sizing to customizing the perfect engagement rings, and how rewarding it is to be there for each couple’s love story.

Let’s make your proposal surprise unforgettable, starting with a ring that fits perfectly and tells your love story beautifully. Ready? Reach out to our expert Jewellers now!