How to Measure Ring Size at Home

We’ve Got All the Shortcuts for Figuring Out Your Ring Size at Home

If you don’t know your ring size, it can be hard to buy this type of jewelry online. A right-sized ring will fit comfortably and securely, so you can wear it with ease. When you’re seeking ways to complete your look, Rank & Style can help you find the best, data-backed methods to choose the right ring with finesse. We’ll cover how a ring should fit, ways to measure and find your size, and more.

Shopping for rings online can be tricky when you don’t know your size—and the last thing anyone wants is a too-tight band or a ring that slides right off. The perfect fit should feel snug but comfortable, allowing you to wear your jewelry with confidence and ease.

Whether you’re eyeing a new statement piece or planning a surprise gift, we’ve got the inside info for figuring out your ring size with ease. At Rank & Style, we use data-backed insights to help you make smart style decisions, including how to measure your ring size at home. In this guide, you’ll learn how a ring should fit, simple ways to measure your size, and tips to ensure your next jewelry purchase is just right.

Why Knowing Your Ring Size Matters

Getting your ring size right isn’t just about comfort—it’s key to making sure your jewelry looks great and stays put. Guessing your size or using inaccurate tools can lead to frustrating (and costly) mistakes. Think slipping bands, rings stuck on swollen fingers, or sizing that feels off after just a few wears.

Factors like knuckle size, finger swelling, and even the width of the ring band can all affect how a ring fits. Knowing your true size helps you avoid the hassle of returns and ensures that your new accessory feels as good as it looks—for years to come.

How Should a Ring Fit?

The perfect ring should feel like a seamless extension of your hand—comfortable, secure, and easy to wear all day. A properly sized ring means you can skip the hassle of resizing later and simply enjoy your new piece from the start.

Here’s how to tell if a ring fits just right:

It feels snug but not tight—secure enough to stay in place without pinching or squeezing.
It slides on easily but offers slight resistance over your knuckle—a little tug when removing it is a good sign.
It doesn’t leave deep marks or indentations on your skin after wear.
It never feels painful or cuts off circulation—numbness or tingling is a big red flag.
It can move freely on your finger without slipping off.

The goal? A ring that stays put, looks great, and feels like second nature.

How to Measure Ring Size at Home

Shopping for rings online? Knowing your size is key to avoiding returns or costly resizing. Fortunately, you don’t need to visit a jeweler to figure it out—there are several easy, at-home methods that can help you get it right.

All products and deals are sourced by the Rank & Style team using data and expert insights. If you shop through our links, we may earn a commission—at no extra cost to you.

May 15, 2025

Written By:Meredith Rimmer

Product Expert:Georgia Jones

Measure Your Ring Size Using a String or Paper Strip

@ericajewelss

This DIY method is simple and uses supplies you have around the house, but it works best when done carefully.

Here’s how to get it done:

Cut a piece of non-stretchy string or a thin strip of paper (about ¼ - ½ inch wide works best).
Wrap it around the base of your finger—snug but not tight.
Use a pen to mark where the ends meet.
Lay it flat and measure the length (in millimeters) with a ruler.
Compare your measurement to a standard ring size chart to find your size.

Pro tip: This method is quick and free, but not always the most precise. Try it a few times or pair it with another method if you're unsure. (Image credit: @ericajewelss)

Use a Printable Ring Size Chart

Another way to find your ring size is to use a printable size chart from a jeweler’s website (like this size chart from Zale’s) that you can use at home.

Here’s how we use one:

Print the chart at 100% scale (make sure scaling is set to “actual size”).
Grab a ring that fits the intended finger.
Place the ring over the circles on the chart to find the one that best matches the inner edge of your band.
If the ring falls between two sizes, it’s usually safer to go with the larger one.
Mark your size for future reference.

Use a Ring Sizer Tool

@shopthinkunique

If you want a more accurate measurement, a ring sizer is a great investment (and usually costs under $10). It’s a small plastic or metal tool that measures your finger’s circumference—it’s easy to use, and can save you money in the long run.

Use it to measure your ring size accurately by following these steps:

Get the sizer ready to use by putting one end of the sizer through the buckle on the other end to make a loop.
Slide the finger you want to measure through the loop
Tighten the sizer around your finger until it fits how a ring should—snug, but not too tight.
Slide the sizer over your knuckle—if it won’t slide over it comfortably it’s probably too tight. If it comes off too easily, tighten the sizer slightly.
Once the sizer fits like your ideal ring would, look at the buckle on the sizer—the arrow should be pointing at your perfect size.

(Image credit: @shopthinkunique)

Measure a Ring You Own

@alicepotteralice

If you have a ring you love to wear, you can use a ruler to measure its diameter and determine its size.

Try measuring the ring like this:

Place it flat on a ruler and measure the inner diameter (the hollow space) across the center of the band.
Match that measurement (in millimeters) to a ring size chart to determine your size.

Pro tip: This is a great option if you're shopping for someone else and can discreetly borrow one of their rings. Image credit: @alicepotteralice)

Tips for Accurate Ring Sizing at Home

Want to make sure your at-home ring measurement is as accurate as possible?

Keep these expert tips in mind before you start:

Measure at room temperature.
Your fingers can shrink in the cold and swell in the heat, so aim to measure them when you're in a comfortable, climate-controlled environment.
Take multiple measurements.
To get the best average, measure your finger at different times of day and on a few separate days. Your results should be fairly consistent—if not, you may want to try another method.
Consider your knuckles.
If your knuckles are larger than the base of your finger or you're between sizes, it's usually best to size up for a more comfortable fit.
When in doubt, ask a pro.
If you're unsure about your measurements or need a second opinion, visiting a jeweler can give you peace of mind and help you avoid costly sizing mistakes.

Understanding a Ring Size Chart

Ring size charts are standardized guides that help you match your finger’s measurements to the correct ring size. Whether you're using a printed chart or one provided online, it’s important to understand how to read it—especially if you're shopping internationally.

In the U.S., ring sizes are numerical and typically range from size 3 and up, increasing in half-size increments (e.g., 3, 3½, 4, etc.). These sizes correspond to specific measurements in millimeters. For instance, a U.S. size 8 ring generally has an inner diameter of about 18.2 mm.

In the U.K., ring sizes use letters instead of numbers. The chart starts at size A for the smallest ring and goes up alphabetically to Z, with half sizes like A½, B½, and so on. The further along in the alphabet, the larger the ring.

To determine your ring size using a chart:

First, measure the diameter or circumference of your finger using one of the at-home methods discussed above.
Then, locate that measurement on a ring size chart.
The number (U.S.) or letter (U.K.) that lines up with your measurement is your ring size.

Be sure to use a reputable, accurately scaled chart—either online from a trusted jeweler or at a jewelry store—to get the best fit.

How to Figure Out Someone Else's Ring Size

If you’re looking to surprise someone with a special ring, you’ll need a little stealth and creativity. Asking directly might ruin the fun, so if you want to keep things under wraps, here are a few clever ways to find their ring size without giving yourself away.

Borrow Their Favorite Ring

If you can manage to borrow a favorite ring for a moment without attracting attention, you can determine your partner’s ring size.

Just make sure to:

Take note of which finger the ring is worn on.
Trace the inner circumference on a piece of paper (or press it into a bar of soap for a more three-dimensional impression).
Return the ring to its original spot promptly.
Use a ring size chart to compare the tracing or impression, or bring it to a jeweler to get an expert opinion.

Ask Friends or Family for Help

When in doubt, call in backup. A trusted friend or close family member can casually bring up the topic of jewelry or ring sizes in conversation. Choose someone who knows how to keep a secret and can steer the conversation naturally without spoiling your surprise.

Plan a "Just-Because" Shopping Trip

Another clever move? Invite the person you’re ring shopping for on a casual shopping trip—perhaps for a birthday, anniversary, or no reason at all. While browsing, casually steer them toward a jewelry counter. As they try things on, you can discreetly note which rings fit best or even ask a jeweler to measure their size under the guise of playful curiosity. You could even try on a few rings yourself to keep things subtle.

How to Get Ring Size Measured in-Store—Retailers That Offer Professional Sizing for Rings

Measuring your ring size at home is convenient, but nothing beats the accuracy of an in-store fitting. Whether you’re shopping for an investment piece or planning a surprise gift, visiting a professional jeweler ensures you get the perfect fit—no guesswork required.

Most jewelry stores offer complimentary ring sizing services. A sales associate will typically use a tapered metal sizing tool called a mandrel or a set of ring sizers to measure your finger. You may also be encouraged to try on sample rings to see which size feels most comfortable.

If precision is your goal (and especially if resizing later isn’t an option), this is the most reliable way to go.

Popular retailers that offer professional ring sizing include:

Macy’s:
Most Macy’s jewelry counters offer complimentary sizing services, whether you're shopping or bringing in an existing ring for adjustment. If you find a new ring you love, you can use our Macy’s promo code to get a great deal.
Bloomingdale’s:
The in-store jewelry consultants at Bloomingdale's can use professional tools to size your finger or help confirm your existing ring size. While you’re there, you can use our Bloomingdale’s promo code to save on a spectacular ring.
Kendra Scott:
Associates at Kendra Scott boutiques will take measurements and advise on fit, especially for their signature styles. Our Kendra Scott coupon code gives you 15% off the ring of your choice.
Kay Jewelers:
The professionals at Kay offer complimentary sizing for rings in-store and resizing services for rings purchased through the brand. Staff can also assist with measuring for future purchases. If you’re shopping for a special occasion ring, a Kay Jewelers promo code can make the experience sweeter.
Saks Fifth Avenue:
Saks' jewelry associates can assist with professional sizing in-store for any ring, including their luxury and designer offerings. Use our Saks Fifth Avenue promo code to save on stunning statement jewelry.
Zales:
Zales provides professional ring sizing at all retail locations. They also offer free resizing for rings purchased at Zales within the adjustment period.

Questions About Ring Sizing

What’s the average ring size for women?

In the U.S., the average ring size for women is a size 6.

Can rings be resized after buying?

Rings with simple, precious-metal bands can usually be professionally resized after purchase, but there may be limitations. Jewelers can generally make rings up to two sizes larger or smaller, but they may not be able to resize rings with gems set into the band.

Are printable ring sizers accurate?

Printable ring sizers are convenient, but they are susceptible to user error. For the most accurate and precise measurement, use a specialized sizing tool or visit a jewelry store for a fitting.

View All Top 10 Lists