Getting the right ring size is crucial, whether it's for a surprise proposal, a special gift, or treating yourself. An ill-fitting ring can be uncomfortable, easily lost, or impossible to wear. This comprehensive Ring Size Guide takes the stress out of sizing, covering DIY methods, professional options, international charts, and expert tips.
Why Ring Size Accuracy Matters:
Comfort: A well-fitting ring shouldn't pinch or slide off easily.
Security: Reduces the risk of losing a precious piece.
Practicality: Ensures the ring sits correctly on the finger.
Sentiment: Especially important for engagement rings and wedding bands.
Ring Size Guide
You’re ready to take the leap and propose, marking the beginning of your journey towards a lifetime together. To help you choose the perfect engagement ring, we offer some invaluable advice, even if you’re planning a surprise proposal.
The most precise method to determine your ring size is to be professionally measured in-store. We would also suggest to go to your local jeweler if its possible to measure. However, if that’s not an option, we provide a downloadable ring sizer to help you measure your ring size at home. Just follow these simple steps:
Two Ways To Measure For a Ring
Materials Needed:
- Printer and paper
- String, yarn, floss, or a thin strip of paper
- Pen or marker
- Ruler
Steps:
- Choose the Finger & Time: Target the correct finger. Do this late afternoon/evening.
- Wrap: Wrap the string or paper snugly (but not tight) around the base of the finger. It should slide over the knuckle comfortably but not be loose. Think "comfortably snug."
- Mark: Mark the point where the string/paper overlaps completely.
- Measure: Straighten the string/paper and measure the length between the mark and the end in millimeters (mm). This is your finger's circumference.
- Find Your Size: Use the Ring Size Conversion Chart below to find your size based on the circumference measurement.
Materials Needed:
- Printer and paper
- Scissors
Steps:
- Select the Ring: Choose a ring that fits the finger the new ring is for and is a similar width to the new ring.
- Measure the Inside Diameter:
- Place the ring on a ruler.
- Measure the straight-across distance inside the band from one inner edge to the opposite inner edge in millimeters (mm).
- Find Your Size: Use a Ring Size Conversion Chart (see below!) to match your measured diameter to your standard ring size (US, UK, EU, etc.).
- Measure the Inside Circumference (Alternative):
- Wrap a thin strip of paper tightly around the inside of the ring. Mark where it overlaps.
- Unwrap and measure the length in mm.
- Match this circumference measurement to a ring size chart.
Best For: When you have access to a well-fitting ring on the correct finger. Great for surprise proposals if you can borrow a ring!
By using our user-friendly ring sizer, you can ensure a comfortable and secure fit for your new ring.
The Basics:
Let’s begin with the essentials:
The engagement ring is worn on the third finger (next to the little finger) of the left hand.
If you visit us for a consultation with your partner, we’ll measure the ring finger using a ring sizer. However, if you can’t make it to an in-person consultation or want to keep the element of surprise, feel free to download our printable ring sizer. This convenient tool allows you to measure your or your partner’s ring size in the privacy of your own home by measuring the inner diameter of an existing ring.
| Circum mm | Diameter mm | Ring size | Ring size EU | Ring size UK | Ring size USA |
|---|---|---|---|---|---|
| 37.8 | 12.04 | 12 | 38 | A | 0.5 |
| 39.1 | 12.45 | 12.5 | 39 | B | 1 |
| 40.4 | 12.85 | 13 | 40 | C | 1.5 |
| 41.7 | 13.36 | 13.5 | 42 | D | 2 |
| 42.9 | 13.67 | 13.5 | 43 | E | 2.5 |
| 44.2 | 14.07 | 14 | 44 | F | 3 |
| 45.5 | 14.48 | 14.5 | 45 | G | 3.5 |
| 46.8 | 14.88 | 15 | 47 | H | 4 |
| 48 | 15.29 | 15 | 48 | I | 4.5 |
| 48.7 | 15.49 | 15.5 | 49 | J | 5 |
| 50 | 15.9 | 16 | 50 | K | 5.5 |
| 51.2 | 16.31 | 16 | 51 | L | 6 |
| 52.5 | 16.71 | 16.5 | 52 | M | 6.5 |
| 53.8 | 17.12 | 17 | 54 | N | 7 |
| 55.1 | 17.53 | 17.5 | 55 | O | 7.5 |
| 56.3 | 17.93 | 18 | 56 | P | 8 |
| 57.6 | 18.34 | 18 | 58 | Q | 8.5 |
| 58.9 | 18.75 | 18.5 | 59 | R | 9 |
| 60.2 | 19.15 | 19 | 60 | S | 9.5 |
| 61.4 | 19.56 | 19.5 | 61 | T | 10 |
| 62.7 | 19.96 | 20 | 63 | U | 10.5 |
| 64 | 20.37 | 20 | 64 | V | 11 |
| 65.3 | 20.78 | 20.5 | 65 | W | 11.5 |
| 66.6 | 21.18 | 21 | 67 | X | 12 |
| 67.8 | 21.59 | 21.5 | 68 | Y | 12.5 |
| 68.5 | 21.79 | 22 | 67 | Z | 13 |
The average women’s ring size is 52-54 (European size), while the average men’s ring size is 60-62.
Estimating your partner’s ring size can be accomplished with a bit of common sense.
If your partner has a petite frame, their hands might be smaller with slender fingers. In this case, consider starting with a size 48 or 50 for women and around 58 for men.
For partners of average height, their finger size likely corresponds to their height. The typical finger size is 52 for women and 60 for men.
Lastly, if your partner is taller or has a larger build, their weight is naturally distributed throughout their body, so it’s a good idea to start with a ring size of 54 or 56 for women and a size 64 for men.
How can you determine your partner’s ring size without their knowledge?
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If directly inquiring isn’t feasible, you might consider seeking assistance from your partner’s family and friends, as they could provide valuable insights. One idea is to have their friends suggest a casual outing to try on rings and measure finger sizes while they’re at it.
Another alternative is to discreetly measure a ring your partner already wears on their left-hand ring finger. Keep in mind that if the ring’s width deviates from 2mm by a considerable amount, the size might not be entirely accurate, but it will still serve as a rough estimate.
Additionally you can send us some pictures of your partner’s hands and we will try our best to determine his/hers/their size. We have much experience in that.
Pro Tips & Common Mistakes to Avoid
- Don't Guess! Fingers vary wildly. Don't assume you know yours or someone else's size.
- Knuckles Rule: Always ensure the ring fits over the knuckle comfortably. A size that fits the base but won't go over the knuckle is useless.
- Width Matters: Wider rings need a larger size than thin rings for the same finger comfort.
- Temperature & Swelling: Avoid sizing when your hands are very cold (fingers shrink) or very hot/swollen (after exercise, salty food, high humidity, pregnancy). Late afternoon is generally best.
- Measure Multiple Times: If DIY-ing, measure 3-4 times for consistency.
- Consider Resizing: Many rings (especially simple bands) can be resized, usually up or down by 1-2 sizes. However:
- Eternity bands (diamonds all around) are very difficult or impossible to resize.
- Certain metals and intricate designs are harder to resize.
- There's always a small risk.
For Surprise Proposals:
- Borrow a Ring: Safest method. Borrow a ring she regularly wears on her ring finger.
- Trace the Inside: Press the ring into soap or clay, or carefully trace the inside circle on paper.
- Enlist Help: Ask her mom, sister, or best friend to casually find out.
- Guess Slightly Larger: If completely stuck, it's often better to go slightly larger (easier to temporarily size down with ring adjusters) than painfully small. The average women's ring size is 6-7 (US), men's is 9-10 (US).
Ring Measuring Tips
These are some tips to keep in mind when measuring ring size
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Comfort
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Keep in mind the ease of sliding the ring onto your finger and the natural fluctuations of finger size due to temperature changes.
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Pregnancy
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Be aware that pregnancy can affect ring size, as fingers may swell during this period.
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Temperature
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Warm temperatures cause the skin to expand, while cold temperatures make it contract. Take this into account when measuring your ring size.
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Weight loss or gain
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Changes in weight can impact the fit of the ring, whether it becomes too loose or too tight.
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Time
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Evening measurements are recommended for determining ring size, as fingers tend to be larger compared to mornings.
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Ring resizing options
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If you don’t get the perfect fit initially, don’t worry. We offer complimentary resizing for up to two sizes up or down within the first 90 days.
Need help finding your ring size?
The Diamond Lab Customer Service Team is here to assist you if you require further guidance.