Ring Size Chart & Conversion Guide (how to get it right)

Jan 10, 2025
Ring Size Chart & Conversion Guide (how to get it right)

Ring Size Chart & Conversion Guide (how to get it right)

You can be in the market for an engagement ring or simply picking up something you see as fun and flashy to wear on a daily basis, but a comfortable fit is the key.


Actually, you don’t deserve just a comfortable fit. You deserve a PERFECT fit.


For this reason, it’s really important to measure your ring size while you’re sitting in your own home. Whichever finger you’re shopping for, you’ll find the correct size for your rings.

What is an average ring size?

All our bodies are different shapes and sizes, so what would you expect our finger sizes to be?! However, according to data from jewelry stores around the world, some ring sizes are more common than others.


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Most women’s ring fingers fit a size 3 to a size 6.5 in the U.S. On an average, women are 6.5 the world over. For men’s rings the average size range is 9 to 10 with 9 being the most popular size.

Your Ring Size Guide

Mind the Time of Day

You may not know, but your finger size is subject to time of day. Your finger size often isn’t as large as it is when it’s early in the morning and still chilly out. In other words, measuring your finger early in the morning may lead to a too-snug ring… later. That’s why you wait until the early evening when temperatures are warmer so you don’t have such a tight fit.

Take the Right (or Left) Hand Measurement

Don’t forget that the fingers of your dominant hand are usually bigger than those on your non dominant hand. If you're sizing for an engagement ring or wedding band, this means do the left, not the right ring finger. The two can be fairly different though.

Beware of the Knuckle

Don’t forget to measure the knuckle when you’re measuring your finger. If your base of finger is very small then you can put the size of the ring past the knuckle. So to make sure that your ring goes on easily, and stays on, try measuring both your knuckle and finger base, and if possible measure the ring before you buy it.

Check Out the Ring Itself

When selecting your size try to keep in mind how large you want the ring to be. However, wider bands generally are more snug fit, if the band is wider than 6mm, you will want to order a ring size slightly larger. You should be able to get away with a quarter to a half size difference.

Chain rings run small as well; so you may have to go a full size bigger for the perfect fit.

Well, now you’re good to go. These are the easiest ways to size a ring.

Go to a Jeweler

You’re thinking, well duh. Of course, if you’re having difficulty, a jeweler can easily tell you what size you are pretty quickly by using a ring sizing tool. So, we’re all pretty busy, and what if you see the perfect trendy gemstone ring online, that you just have to buy right now!!!


We don’t always have time to go to the jewelry store. Luckily, there are ways you can measure your calipers at home.

Printable Ring Sizer Tools

And you don’t need to spend any money to 'DIY' it with a printable ring sizing tool. Print it out, wrap it around the base of the finger you’ll be wearing the ring on, and make a mark on the spot where that one spot overlaps the other one.


Printers are quite out of fashion, so if you don’t have one lying about that’s fine, you can skip to one of the other mentions below as well.

Try a Tape Measure

With a measuring tape, you can easily measure your correct ring size by wrapping it around the base of your finger. Measure in millimeters then pop it on your ring size chart. Voila, you’re done.

Use a String

No tape measure in the house? No problem.

  • Step 1: Take a piece of string, floss, or even a strip of paper.

  • Step 2: You guessed it, wrap it around – the base of your finger.

  • Step 3: Using a marker or pen, draw a line where the ends overlap.

  • Step 4: Bring your ruler line to line and take note of the measurement in millimeters to find out what your perfect fit is. Simply check it against the conversion chart now!

Keeping It a Secret?

If you’re shopping for a Valentine’s Day Gift or covering the necessity of a wedding ring, what do you do?

It ruins all the fun and surprise when you ask your loved one. But you can never ask friends and family if they know the person’s ring size and ruin a surprise, too!


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The easiest thing is to get hold of another ring that you’ve seen them wear. Lay the ring straight across the ring and use a ruler to measure inside the ring. Distance from one inner point to the other is referred to as diameter.


Another way of finding the ring size of your partner is by laying the existing ring over a printable ring size chart.


If you don’t have a different way of knowing their exact size, you can choose to pick a larger size and you will have it resized later on.

U.S. Ring Size Chart

Here’s a basic ring size chart that converts millimeters into ring sizes from the US and Canada:

Millimeters  –  Ring Size

  • 13.67  – 2 ½

  • 13.87  –  2 ¾

  • 14.07  – 2 ⅞

  • 14.27  – 3

  • 14.38  – 3 ⅛

  • 14.48  – 3 ¼

  • 14.58  – 3 ⅜

  • 14.68  – 3 ½

  • 14.88  – 3 ¾

  • 15.09  – 4

  • 15.29  – 4 ¼

  • 15.39  – 4 ½

  • 15.49  – 4 ¾

  • 15.6   – 4 ⅞

  • 15.7  – 5

  • 15.9  – 5 ¼

  • 16   – 5 ⅜

  • 16.1  – 5 ½

  • 16.31  – 5 ¾

  • 16. 41  – 5 ⅞

  • 16.31  – 5 ¾

  • 16.51  – 6

  • 16.51  – 6

  • 16.71  – 6 ¼

  • 16.92  – 6 ½

  • 17.12  – 6 ¾

  • 17.32  – 7

  • 17.53  – 7 ¼

  • 17.73  – 7 ¾

  • 18.14  – 8

  • 18.34  – 8 ¼

  • 18.54  – 8 ½

  • 18.65  – 8 ⅝

  • 18.75  – 8 ¾

  • 18.85  – 8 ⅞

  • 18.95  – 9

  • 19.05  – 9 ⅛

  • 19.15  – 9 ¼

  • 19.25  – 9 ⅜

  • 19.35  – 9 ½

  • 19.46  – 9 ⅝

  • 19.56  – 9 ⅗

  • 19.66  – 9 ⅞

  • 19.76  – 1

Getting Your Ring Resized

However, make sure you get your ring resized by an expert jeweler if you genuinely need to. The best place to turn to is the establishment that made the ring.


In the end what you can’t trust is the general average and you can’t trust that that ring is the ring that’s going to be the right fit for you. After all, you’re not exactly average!If the Ring Fits, Wear It!


READ MORE :: Custom Ring Size Chart | How to Size Your Finger

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