Discovering your ring size, or that of someone special, is far less complicated than you might imagine. There’s absolutely no need to stress over how to measure ring size when you have the right guidance.
Countless at-home tricks and simple tools are available, and they’re all laid out here with crystal-clear instructions and printable helpers for completely foolproof results.
Keep reading to pinpoint the exact size you need, so that ring feels absolutely perfect the moment it slides onto your finger.
How To Measure Ring Size At Home?
A handful of reliable methods exist for figuring out how to measure your ring size at home.
- Loop a piece of string or dental floss around your finger, and then mark the spot where the end overlaps.
- Wrap a slender strip of paper around your finger, marking the meeting point as well.
- Take another ring you already own and measure it using a jewelers mandrel.
- Circle a flexible tape measure around your finger and record the length.
- If uncertainty lingers, a helpful video can walk you through the process of capturing perfectly accurate ring size measurements right at home:
Everything you’re doing here is simply about determining the length in whatever unit you prefer.
After you have that number, a convenient international ring chart in the section below can translate it for you.
How To Measure Ring Size In cm And mm?
Just use our international ring size chart with ease. Once you’ve measured the finger using any of the methods described above, simply select the closest measurement to reveal the corresponding size.
Diamonds are a truly global business, and since most countries involved in the diamond trade use the metric system, this is the standard you’ll rely on to find your ideal ring size.
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If you’re measuring in mm (millimeters), using our table will be an absolute breeze. To convert mm to inches, apply the simple formula 1 inch = 25.4 mm.
For a measurement in centimeters, just divide the millimeter value by 10.
How to Measure Ring Size in Inches
Measuring a ring size in inches is a straightforward process you can tackle at home with just a few basic materials. To find a ring size in inches, gather a piece of string, a ruler, and the specific finger you plan to measure.
How to measure for ring size at home? Just follow these simple tips.
Take the string and wrap it around the base of the finger where the ring will actually sit. Ensure the string feels snug, but not uncomfortably tight.
Mark the exact spot where the string overlaps, and then measure that length of string from the starting end to your mark using a ruler.
Refer to the chart below to match the string length to the correct ring size:
- 1 15/16 inches = Size 4
- 2 inches = Size 4.5
- 2 1/16 inches = Size 5
- 2 1/8 inches = Size 5.5
- 2 3/16 inches = Size 6
- 2 1/4 inches = Size 6.5
- 2 5/16 inches = Size 7
- 2 3/8 inches = Size 7.5
- 2 7/16 inches = Size 8
- 2 1/2 inches = Size 8.5
- 2 9/16 inches = Size 9
- 2 5/8 inches = Size 9.5
- 2 11/16 inches = Size
By walking through these simple steps, you can accurately measure a ring size in inches and lock in a flawlessly comfortable fit.
How to Determine Ring Size Based on Height and Weight
When you don’t have an existing ring to use as a reference, a person’s height and weight can help you estimate the ring size:
Height up to 170 cm and weight up to 60 kg: the finger diameter tends to fall between 16–17.5 mm.
Height over 170 cm and weight above 60 kg: the diameter is generally around 18–19.5 mm.
For men up to 80 kg: a diameter of 18.5–20.5 mm is a typical fit.
Furthermore, clothing size can serve as another helpful reference point for approximating finger diameter.
Method Limitations
This approach offers an estimate only, which means the result might not be exact. Consequently, there is always a risk of selecting the wrong size.
Should the ring end up too tight or too loose, a professional jeweler can typically resize it for you.
Important Notes About Resizing
- A ring can generally be adjusted by a maximum of one full size.
- Resizing is only a viable option for jewelry crafted from precious metals and that avoids intricate designs or stone settings.
- Rings featuring complex details or made from alternative materials are usually not candidates for resizing.
How To Measure Correct Ring Size Online
How to figure out ring size? Just place a ring you currently own over the circle outlines until you discover a perfect match.
If you find yourself stuck between two sizes, always order the larger one.
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The string method isn’t a perfectly precise science, so it’s always smart to use this engagement ring guide for the proper size as a double-check before you go off to finalize your purchase.
We also have a handy resource for anyone wondering how to measure ring size specifically for online shopping. Try out this online Ring Size Wizard – a simple digital tool for figuring out ring size.
Tips On Measure Ring Size With Paper
This next set of pointers teaches you how to measure a finger for ring size using nothing more than paper.
You can use the primary secret weapon from our toolkit: this printable ring sizer.
Wrap it around your finger to discover your exact size.
Click to download the paper test
How To Measure Ring Size With A Ruler
Using a ruler to find your ring size isn’t the most common approach, but it’s far from impossible. How to measure ring size with a ruler?
Follow these instructions.
Measuring your ring size with a ruler starts with choosing a beginning point on your finger to act as point 0.
Next, carefully pivot the ruler around your finger, ensuring it never lifts away from your skin at any point.
When you’ve smoothly rotated the ruler entirely around the finger and arrived back at point 0, you’ll have secured your final measurement.
Measure Ring Size With String
Using a string remains one of the most wonderfully simple approaches available. It helps you accurately calculate the correct ring size.
Take the string and wrap it around your finger precisely at the spot where the ring will rest.
Straighten the string out fully and lay it flat against a ruler. If you are using inches, refer back to our conversion formula mentioned earlier.
If you are working in millimeters, head straight to the international sizing chart we’ve provided to look up your perfect size.
How To Know Ring Size With Tape Measure?
This method closely mirrors the string approach but cleverly bypasses the step of having to measure separately.
If you want to know how to measure ring size with a tape measure, keep our advice in mind. Cloth tape measures are notably thicker than string, so you’ll need to pay close attention to how it’s positioned while measuring.
The key with both techniques is to avoid wrapping too tightly or leaving it too loose.
The material should sit firmly against your skin, yet without digging in sharply. That gives you the most comfortable fit possible.
How To Measure Ring Size From A Ring Without Her Knowing?
If you are wondering how to measure ring size from a ring, two absolutely surefire methods exist for getting her ring size without her ever finding out.
In either scenario, pay close attention to a ring she loves wearing that seems to fit her comfortably.
When she takes it off, be ready with a bar of soap (or some playdough if that’s easier) and firmly press the ring into it to create a clear mold. If you don’t have the luxury of that much time, option B is to quickly slide it onto your own pinky finger and make a mark exactly where it stops.
Then use the measurement methods already described to find the number.
Measuring Ring Size For Silicone Ring
How to check ring size for a silicone ring?
You can rely on the exact same measurements, techniques, and international sizing standards used for a traditional ring.
However, compared to a standard metal band, silicone behaves quite differently. The material offers more give and does stretch just a tiny bit.
It’s generally best, particularly if you’re caught between sizes, to err on the smaller size to fully use the flexible, stretchy nature of silicone.
How To Measure Man’s Ring Size?
The way to measure a man’s ring size is absolutely no different from measuring a woman’s finger, and the sizing chart remains universally the same. Women also need to know how to measure ring size men for a successful purchase outcome.
The single distinction is that men’s rings are typically a touch thicker and slightly broader. These dimensional differences can make the ring feel tighter, so moving a half-size-up is frequently necessary to maximize all-day comfort.
How To Do Ring Size Without Taking Measurements?
If you are deep in wedding planning and buying a ring as a total surprise, and every other method falls short, just hold her hand. Make a careful mental note of how large her finger feels inside your hand, and try to track down a household object that is roughly that same size so a jeweler has a solid visual reference point.
This is a simple way to know how to measure ring size women.
When relying on this ‘guesstimation’ approach, it’s always wiser to lean toward a slightly larger size. A ring that is a little too big is far easier to resize than one that is much too small.
Whether you’re measuring your own finger or choosing an engagement ring for a surprise proposal, the entire purpose of capturing a measurement is so the ring feels completely natural on the finger.
While taking your measurements, it’s useful to keep in mind just how much fingers can fluctuate. They get thicker when they are warmer, meaning the time of day and even the season plays a role, and the ring also has to slide past the knuckle which is often wider than where the ring sits.
For the most reliable results, measure your finger at the end of the day and always leave a little room for the knuckle.
Does Carat Size Depend On Ring Size?
While figuring out how to measure ring size is an essential step when buying a ring, it’s also helpful to understand that the ring’s size has absolutely nothing to do with the carat weight. No matter if your chosen ring is on the smaller or larger end of the spectrum, the carat size depends entirely on your personal taste, your budget, and what your partner would adore wearing on their hand.
While a surprising number of people are convinced that the physical ring size dictates the carat size, this is completely untrue and a widespread misconception. A ring’s size has zero impact on the carat weight, big or small.
What If The Ring Size Is Wrong?
Knowing how to determine ring size can save you from the trouble of buying an incorrect size in the first place. But should you find yourself stuck in this tricky situation, you could then consider resizing the ring if an exchange for a closer size in a matching design isn’t possible at the shop.
Rings can safely be resized by up to two sizes either up or down; pushing the metal beyond that limit could negatively impact the ring’s structural integrity. Also, if you feel any uncertainty about your or your partner’s true ring size, stay away from purchasing an eternity ring with diamonds wrapping all around the band since these have no excess metal and can only be adjusted by a quarter size up or down.
Frequent resizing is also strongly discouraged, so after about two or three alterations, it would be much wiser to simply have the ring remade entirely.