There are several ways to find out your ring size when buying a ring online, including using a measuring tape or ruler to measure your finger circumference or the diameter of a ring you already own. If you’re choosing a wide ring, it’s best to go up one size for a more comfortable fit.
You’ve spotted this cute little gold-plated ring on the Perles&Co website, but here’s the thing—you don’t know your ring size! Don’t panic—we’ve got you covered! When buying a ring online, it’s important to know your exact size. That’s why we’re sharing some tips on how to measure your finger size!
There are different methods, the most reliable being to usea professional metal ring sizer. However , if you don’t have this tool on hand, we have other solutions.

How to measure your finger circumference without a ring sizer?
- With a measuring tape :
Measure your finger circumference at the knuckle and note the measurement in millimeters.
Example: if your finger circumference is 54 mm, you will need a size T54 ring.
- With a ruler:
Measure the inside diameter of one of your rings and refer to our chart below.
Example: If you have a ring with an inner diameter of 16 mm, your French ring size is 51 and your US ring size is 5.75.
Here’s the perfect way to discreetly measure your loved one’s finger circumference and give her the ring of her dreams!
- With a metric ring sizer:
Are you familiar with the metric ring sizer, also known as a ring measuring tool? It’s a professional tool that allows you to measure a ring size with great precision. Simply slide your ring onto the sizer and read the corresponding size.
Note: when it comes to a wide ring, it’s often recommended to go up one size. For example, if your finger size is 54, it’s best to choose a size 55 ring.
You’re now ready to shop online! You’ll fall in love with our ultra-trendy rings, perfect for wearing alone or stacked! Whether it’s the weekday ring, the braided ring, the twisted ring, the ethnicring, or even the ring to decorate with a cabochon, you’ll want them all!



How can you measure your ring size without a ring sizer?
If you don’t have a ring sizer, there are two simple methods you can use. Using a flexible measuring tape, wrap it around your finger at the knuckle and note the measurement in millimeters: this is your French ring size (e.g., 54 mm = size 54). Using a ruler, measure the inside diameter of an existing ring and consult a size conversion chart.
How can I discreetly measure someone's ring size so I can buy them a ring?
The easiest way: discreetly borrow a ring that the person regularly wears on that finger, and measure its inner diameter with a ruler. Then consult a size chart to find the right size.
Credits
Perles & Co, Internet & E-Commerce company [15/04/2026] Any reproduction, representation, adaptation, in any form whatsoever, even partial, is prohibited, except for reproduction for private use not intended for collective use, representation in the family circle (art. L 122-5 CPI) and online publishing on condition that the source is mentioned and a link is included to the corresponding page of our site www.perlesandco.com.


















