Ring size: how to accurately measure your finger
Choosing a ring is not just about finding a design you like. For your jewellery to be comfortable, secure, and enjoyable to wear every day, you also need to know the correct size. But how do you accurately measure your ring size? Can you find your finger circumference at home? How do you measure an existing ring to prepare a surprise?
The jewellers at Flamme en rose in Montreal present four simple methods to determine your ring size. You will also find a conversion chart between Canadian, American, and European sizes, as well as our advice on temperature, ring width, and resizing possibilities.
Why is it important to choose the right ring size?
A well-fitted ring should pass over the knuckle with slight resistance, then rest comfortably at the base of the finger. It should not pinch the skin, slip, or constantly spin. A precise fit is particularly important for an engagement ring or a wedding band, as these jewels are usually worn daily and associated with precious moments.
The risks of a poorly fitted ring
A ring that is too tight can cause redness and become uncomfortable when fingers swell, especially during hot and humid summer days. Conversely, a ring that is too large can spin, slip, or get lost, particularly in winter when fingers tend to contract. Properly measuring your finger for a ring allows you to choose a comfortable size and reduce the risk of having to resize it after purchase. Depending on the model, the chosen metal, the width of the band, or the setting, some adjustments can be more complex.
When to measure your finger size
Finger volume can vary throughout the day depending on temperature, physical activity, and blood circulation. To measure your ring size more accurately, it is recommended to determine your finger circumference under normal conditions.
- Measure your finger at the end of the day.
- Avoid taking the measurement immediately after physical exertion.
- Do not measure your hands when they are very cold or very hot.
- Opt for an ambient temperature of about 20 to 22 °C.
- Repeat the measurement three or four times at different times.
Method 1: Measure your finger size with our free ring sizer
- Order a free ring sizer here.
- Wrap the plastic strip around your finger in the correct position.
- Follow the instructions on the envelope.
- Watch this explanatory video to fully understand how to measure your finger for a ring.
Three more reliable methods for measuring your ring size
Method 2: Measuring your finger circumference with paper
This method allows you to measure your finger circumference in a few minutes. Avoid thick or stretchy strings, which can tighten or stretch and skew the result. A thin, non-elastic strip of paper generally provides a more stable measurement.
- Cut a thin strip of paper about 10 cm long.
- Wrap it around the base of the finger concerned, without pulling too tight.
- Check that the strip can comfortably pass over the knuckle.
- Mark where the two ends meet.
- Unroll the strip and measure its length in millimeters with a ruler.
- Compare the result with our ring size chart further down in this article.
Method 3: Measuring the diameter of an existing ring
This technique is ideal when you already own a ring that fits the finger concerned perfectly. It can also help you prepare a marriage proposal or a surprise gift. You can discreetly borrow a ring worn on the correct finger and measure it, or photograph it flat next to a ruler.
- Place the ring flat on a graduated ruler in millimeters.
- Then measure its inner diameter, from one inner edge to the other, passing exactly through the center.
- Be careful to measure only the inner space of the ring. The outer diameter includes the thickness of the metal and would give too large a size.
Method 4: Using a professional ring sizer
The ring sizer remains the most reliable method for determining a woman's ring size. It is made up of rings of different sizes that are tried directly on the finger. Unlike methods based on circumference or diameter, the ring sizer allows you to immediately feel the comfort of each size and check the passage at the knuckle.
How to covertly measure your partner's ring size
Comparison Technique
To maintain the element of surprise, borrow a ring that your partner wears on their ring finger for a few minutes. Make sure the reference ring is worn on the correct finger and hand. The size can vary from one finger to another, and also between the right and left hand. You can:
- Measure its inside diameter.
- Trace its inside contour onto a sheet of paper.
- Place the ring on a ruler and photograph it.
- Temporarily take it to a jeweler to have it measured.
Help from a loved one
A family member or trusted person can naturally suggest trying on rings or start a conversation about jewelry sizes. This method can sometimes provide the information without arousing suspicion, but the result should ideally be confirmed with an existing ring.
If you are unsure about the ring size
When the measurement is between two sizes, the larger size is often more comfortable. This recommendation is particularly relevant for a wide band or for someone whose fingers tend to swell. However, adjustment possibilities vary depending on the model, metal, band width, and type of setting. For an engagement ring or a specific custom design, consult our jewelers before making your choice.
Ring Size Conversion Chart
The inside diameter is the width of the ring's interior space. The circumference is the measurement obtained by wrapping a strip of paper around your finger. In Canada and the United States, the North American size follows a numerical scale, usually offered in full and half sizes. Across the Atlantic, the European size approximately corresponds to the internal circumference of the ring in millimeters. The United Kingdom uses an alphabetical system, while some Asian markets have their own numerical scale. Before ordering jewelry, always consult the size chart provided by the jeweler.
| Canada & US Size | Europe Size | Inside Diameter | Circumference |
|---|---|---|---|
| 4 | 47 | 14.9 mm | 46.8 mm |
| 4.5 | 48 | 15.3 mm | 48.0 mm |
| 5 | 49 | 15.7 mm | 49.3 mm |
| 5.5 | 51 | 16.1 mm | 50.6 mm |
| 6 | 52 | 16.5 mm | 51.9 mm |
| 6.5 | 53 | 16.9 mm | 53.1 mm |
| 7 | 54 | 17.3 mm | 54.4 mm |
| 7.5 | 56 | 17.7 mm | 55.7 mm |
| 8 | 57 | 18.1 mm | 57.0 mm |
| 8.5 | 58 | 18.5 mm | 58.2 mm |
| 9 | 60e | 18.9 mm | 59.5 mm |
| 9.5 | 61 | 19.3 mm | 60.8 mm |
| 10 | 62 | 19.8 mm | 62.1 mm |
| 10.5 | 63 | 20.2 mm | 63.3 mm |
| 11 | 65 | 20.6 mm | 64.6 mm |
| 11.5 | 66 | 21.0 mm | 65.9 mm |
| 12 | 67 | 21.4 mm | 67.2 mm |
How to choose the right ring size according to your gender, finger, and model?
Average Ring Size for Women
Women's ring sizes typically range from 6 to 7 in North American sizing, or about 52 to 54 in European sizing. These averages are indicative only: morphology, temperature, and variations in finger circumference all influence the fit. But if your ring spins, what should you do?
Average Ring Size for Men
Men's ring sizes often range from 9 to 10 in North American sizing, or about 60 to 62 in European sizing. Wider hands may require a size 64 to 68, or even more. The width of a wedding band, a signet ring, or a wide ring also influences comfort and fit. To properly measure your finger for a ring, consult our guide on choosing a ring for men.
Wide Ring vs. Thin Ring: Impact on Size
A wide ring covers a larger surface area of the finger and creates more friction than a thin ring. It may therefore feel tighter, even when its diameter matches your usual size. For a ring 6 mm wide or more, it may be advisable to go up half a size. In some cases, a full size up may be more comfortable. For example, a person who usually wears a size 7 with a thin band might prefer a size 7.5 for a wide wedding band or a signet ring.
Finding the Right Compromise Between the Knuckle and the Base of the Finger
When the knuckle is wider than the base of the finger, measure both areas to determine the correct ring size. The ring should pass over the knuckle without force, then remain stable at the base of the finger so it doesn't spin. Our jewelers can help you measure your finger for a ring and find the best balance between comfort, security, and fit.
Which rings can be resized?
Generally Resizable Metals
Yellow gold, white gold, rose gold, silver, and platinum rings can generally be resized. Depending on the required modification, the jeweler can remove or add a small amount of metal. Rings where the stones only cover a portion of the band generally offer more possibilities than fully set models like eternity bands. Each piece must, however, be individually assessed before confirming that resizing is possible.
Metals to Avoid for a Ring Meant to Be Worn a Lifetime
Titanium, tungsten, ceramic, and stainless steel are impossible to resize. If your finger size changes over time, the ring will need to be replaced rather than adjusted. This rigidity can also become a concern in case of injury or significant swelling. A ring that is too tight can compress the finger, while some resistant metals are difficult to remove with a standard ring cutter during an emergency.
Frequently Asked Questions About Ring Sizing
Wrap a thin strip of paper around the base of your finger, mark where the ends meet, then measure the length in millimeters. Then compare this circumference to a ring size chart.
European sizing approximately corresponds to the interior circumference of the ring in millimeters. Canadian and American sizes use a separate numerical scale including full and half sizes.
Generally choose the next size up, especially if the ring is wide or if your fingers swell easily. For a valuable or complex model, confirm your choice with a jeweler.
An additional half size may be recommended for a ring 6mm wide or more. However, the choice depends on the shape of the finger and the exact width of the ring.
Find your ring size with confidence
Taking a few minutes to accurately measure your finger can save you from hesitation, daily discomfort, or needing a resize after purchase. To get the most reliable measurement, order your free Flamme en rose ring sizer. You can also meet with our jewelers in Montreal for personalized advice and to choose a ring that is as comfortable as it is meaningful.
