JSYK, Here's the Trick to Finding Your Ring Size on the First Try

Unless you recently got engaged (in which case, congrats!), you probs don’t know your ring size off the top of your head. And that's totally fine! With different fingers of potentially varying sizes to keep up with, it’s hard to be sure exactly what ring size to select when shopping for rings online. At a store, you could do the whole guessing game thing and slide on all the different sizes until you find one that fits. But when you’re shopping online and have to buy before you try, you’ll want to have a good idea first.

Luckily, most jewelry brands have some kind of sizing or conversion chart you can refer to—but you'll still need to take a measurement. Whether you're all about the DIY way of life or you don't trust yourself (and would prefer something a little more foolproof and accurate), we've got all the advice, tutorials, and product recs for you, below. Because nothing's worse than finding the ring of your dreams only for it to arrive too big or too small to wear. So grab your measuring tape and a pen or a ring sizer (we've got some options for ya, obvi), and let's figure out how to measure your ring size, shall we?

How to measure ring size at home:

So you found a ring you like, yay! But then you go to place it in your online shopping cart, and you're prompted to select your size first from the dropdown bar. Instead of guessing and hoping for the best, try the below tricks and tools for finding your ring size. Reminder: Measure the right finger. Your ring finger on your left hand isn’t necessarily the same size as your right hand, so measure the finger that will actually be wearing the ring. And one more thing: Thicker bands (like chunky rings) fit tighter, so consider going up a quarter or half size (if that's an option) or find a design that can fit multiple sizes. Now, two ways to figure out your ring size:

Measure the circumference of your finger.

  1. Some people use string, others use a strip of paper, but you want to find something about the width of the ring you're trying to purchase that can wrap around your finger. Hold the edge against your finger, and wrap the measuring tool around tightly until it reaches around completely and is perfectly aligned.

  2. Hold both ends in place and draw a line on the string or paper to mark the point where the ends meet or begin to overlap.

  3. Unwrap the strip or string and lay it flat next to a ruler. Measure the distance from the edge to the line you drew. Write down that exact measurement (the more rounding you do, the less accurate the measurement, so try to be precise).

  4. Use a ring-sizing chart to convert the measurement. Most retailers have sizing charts you can refer to, but you can also find plenty of conversation charts online.

Or, use a ring sizer.

Using an actual ring-sizing kit is the most reliable way to get an accurate measurement, and they're pretty cheap and easy to find (sometimes they're even free from the designer). Your best bet is to get your hands on one of these:

  • A ring sizer that looks like a whole bunch of plastic rings. Try on each ring until you find one that's big enough to fit over your knuckle but tight enough not to fly off when you fling your hand.

  • A ring sizer that looks like an adjustable zip tie. Wrap the cable around your finger, insert it through the loop, and pull it until it fits snug but too tight. The number or notch next to the arrow would be your size that you can then convert if you need.


How do you find out someone’s ring size without asking them?

Ring size isn’t something that commonly comes up in conversation over brunch, so it’s pretty obvious you’re trying to buy someone a ring if you straight-up ask them their size. If you want to be a little more discreet about it, sneak a peek at one of their favorite rings when they’re not wearing it. Tons of websites today offer printable charts that allow you to figure out what size a ring is by simply placing it on top of the chart and finding a circle that fits inside the ring. Watch the video below to see what I mean.

According to Tiffany & Co. (aka ~the~ engagement ring store, so they know what they're talking about), you can also use a ruler to measure the diameter inside the ring, and that works, too. So there ya go! You don't have to spoil the surprise. You just have to be sneaky.


Do you measure ring size in CM?

It depends! A lot of stores use millimeters, but the sizing terms can change from brand to brand, so once you know your exact measurement for each finger, use that number and a size-conversion chart to find your size across different retailers so you never end up ordering the wrong size again.


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