Need Her Ring Size? Here’s a Simple Way to Get It Right

• LYLA • 29 May, 2025

Buying a ring is a meaningful and memorable moment—whether it’s an engagement ring a wedding band, or just a symbol of love and appreciation. But one of the most common challenges people face is figuring out the right ring size—especially when it's a surprise.

At Jewcus, we know how important a perfect fit is, both for comfort and for that magical moment of slipping the ring onto her finger. In this guide, we’ll walk you through the average ring size for women, how to measure it at home, and pro tips for getting it just right. Plus, we'll show you how Jewcus can help you create a custom ring that’s as perfect as your love story.

What’s the Most Common Women’s Ring Size?

If you're beginning your journey to find the perfect ring—whether it's for an engagement, anniversary, birthday, or just because—one of the first questions you’ll encounter is: What ring size should I choose? If you're unsure where to start, you’re not alone.

In the United States, the most common women’s ring size is between 6 and 7, which corresponds to a finger circumference of approximately 51–54 millimeters. This range fits a significant portion of the female population, making it a helpful starting point for most buyers. But while this average is useful, it’s not one-size-fits-all.

Women’s Average Ring Sizes Globally

When purchasing a ring—especially online or for someone in another country—understanding international ring sizes can save you from a lot of guesswork and resizing hassles. While the average ring size for women varies from region to region, the sizing systems themselves also differ, making it essential to translate sizes accurately.

At Jewcus, we’re committed to helping you find the perfect fit—no matter where in the world you or your loved one may be. Below, we’ve broken down the average women’s ring sizes across key global regions, along with helpful tips for navigating international sizing.

Average Women’s Ring Sizes by Region

🇺🇸 USA & 🇨🇦 Canada

Average Size: 6 to 7 (U.S. standard)
Circumference: Approximately 51–54 mm
Notes: This is the most common sizing system used in North America. Sizes increase by 0.4 mm in diameter for each full size.

🇪🇺 Europe (EU Sizing)

Average Size: 52 to 54
System: Based on inner circumference in millimeters
Notes: European sizing is numerical and linear, making it easy to convert from circumference measurements.

🇬🇧 UK & 🇦🇺 Australia

Average Size: L½ to N
System: Alphabetical (A to Z)

Notes: UK and Australian ring sizes are based on letters, which can be confusing for U.S. shoppers. Use a conversion chart when ordering internationally.

Asia (e.g., Japan, China, Korea)

Average Size: 4 to 6 (Japan/Korea system)

Notes: Asian sizing systems usually start at smaller numbers to accommodate more petite finger sizes, which are common in many regions.

Find Out Your Ring Size at Home in Minutes

You can easily find out your ring size at home using everyday items. No trip to the jeweler necessary.

Measure with a String or Paper Strip (DIY Method)

This is one of the easiest and most accessible ways to measure your ring size:


What You’ll Need:

A piece of string or a thin strip of paper (about 1 cm wide)
A pen or marker
A ruler (preferably in millimeters)
A ring size conversion chart (available online or via Jewcus)

Steps:

Wrap the string or paper snugly around the base of the finger you’ll wear the ring on.
Mark the point where the two ends meet.
Lay it flat and measure the length in millimeters.
Use a ring size chart to find the corresponding ring size based on circumference.


Use a Ring You Already Own (Quick Comparison Method)

If you already have a ring that fits the desired finger well, you can use it to determine your size.

Steps:

Place the ring on top of a printed ring size chart, aligning the inner edge of the ring with the circles on the chart.
Alternatively, measure the inner diameter of the ring in millimeters using a ruler or caliper.
Match the diameter to the correct size on a conversion chart.

Buy a Ring Sizer Tool (Most Accurate DIY Option)


For a more precise and reusable option, consider buying a plastic or metal ring sizer:
Available online or in jewelry stores
Typically includes a set of bands or a belt-style sizer you wrap around your fingerAffordable, accurate, and useful for future purchases