How to choose the perfect size round diamond
Choose the perfect round diamond for a ring
A diamond is not just a stone – it is an expression of style, elegance and timeless beauty. When choosing a round diamond, size is key to the effect you want to achieve. See visually what 0.1, 0.5, 1 and 2 carats look like and choose the diamond that will impress every time.
Visual example with a raw photo:
Diamond sizes: 0.1, 0.5, 1 and 2 carats.
(model ring size: 52)
0.1 carat – fine luster
- Impression: Relatively small.
- Ideal for: Your first earrings.
- Tip: 0.1 ct is a good start for your collection.
0.5 carat – ele![]()
clear clarity
- Impression: Clearly visible and stylish.
- Ideal for: A classic engagement ring or everyday wear.
- Tip: 0.5 ct is the perfect step towards an impressive piece of jewelry without looking too much.
1 carat – center of attention
- Impression: Large and noticeable, brings a “wow-effect”.
- Ideal for: Engagement rings and jewelry that needs to stand out.
- Tip: 1 ct ensures that your diamond will not go unnoticed and will be a real highlight of the ring.
2 carats – absolute luxury and visibility
- Impression: Impressive and unique, the diamond speaks for itself.
- Ideal for: Special engagement rings and moments where the stone needs to leave a lasting impression.
- Tip: 2 ct is the choice for people who want their ring to be the center of attention and style.
Visual comparison: 0.1, 0.5, 1 and 2 carats
This visual gallery allows you to see how size changes the presence of a diamond. Comparing them, it is clear that larger diamonds of 1–2 ct create an impression that smaller ones cannot achieve.
The choice is yours – shine with 1 or 2 ct
No more compromises. If you want a diamond that impresses and is memorable, 1 and 2 carats are the optimal choice for your ring. They express confidence, style and class and ensure that your ring will be noticeable and unforgettable.
Browse our collection of 1–2 ct round diamonds and choose a stone that speaks for itself.
See also diamond engagement rings for more ideas and combinations.
Determining ring size
3 clever and cute ways to secretly measure your partner's ring size
Planning a surprise like a marriage proposal or a special gift? Finding the right ring size without ruining the surprise can be a challenge, but don't worry—we've got you covered. Here are three clever (and totally doable) ways to find the perfect size without arousing suspicion.
1. Borrow a ring they already wear
The easiest way is to get a ring that your partner already wears on the same finger. Take it to a jeweler or use our size chart to determine the exact size. If you're worried about getting caught, make a quick sketch of the inner circle of the ring or press it into soap to get an impression, then put it back in place.
Tip: Rings worn on different fingers or hands can be different sizes, so make sure it's on the right finger!
2. Seek help from a friend or family member
Seek help from someone close to your partner, such as a best friend or sibling. They may already know the exact size, or they can casually figure it out without arousing suspicion. For example, a "fun" jewelry shopping trip or a chat about accessory preferences can work.
Why this works: Friends and family are masters at keeping secrets and can get the job done with ease.
3. Trick with thread or paper
Feeling brave? Try measuring their finger yourself in a quiet moment or even while they're sleeping. Wrap a piece of string or paper tape around the base of the finger, mark where the ends overlap, and later compare to a size chart.
Tip: Make sure the measurement is snug but not too tight – comfort is key!
Ring size chart
| EU size (circumference) | US | Inner diameter (mm) |
| 44 | 3 | 14.05 |
| 45 | 3.5 | 14.45 |
| 46 | 3.75 | 14.65 |
| 47 | 4 | 14.97 |
| 48 | 4.5 | 15.29 |
| 49 | 4.75 | 15.49 |
| 50 | 5 | 15.7 |
| 51 | 5.5 | 16.1 |
| 52 | 6 | 16.51 |
| 53 | 6.25 | 16.71 |
| 54 | 6.5 | 17.12 |
| 55 | 7 | 17.32 |
| 56 | 7.5 | 17.73 |
| 57 | 8 | 18.14 |
| 58 | 8.25 | 18.34 |
| 59 | 8.5 | 18.75 |
| 60 | 9 | 19.15 |
| 61 | 9.25 | 19.35 |
| 62 | 9.5 | 19.76 |
| 63 | 10 | 20.17 |
| 64 | 10.25 | 20.37 |
| 65 | 10.5 | 20.78 |
| 66 | 11 | 21.18 |
| 67 | 11.5 | 21.59 |
| 68 | 12 | 21.99 |
| 69 | 12.25 | 22.19 |
| 70 | 12.5 | 22.6 |
| 71 | 13 | 23 |
Average ring sizes in Europe
If nothing else works, knowing the average size can give you a good starting point:
- For women: The most common sizes in Europe are between 50 and 54 (US size 5 ¾ to 7).
- For men: Average sizes are usually between 58 and 62 (US size 8 ¼ to 10).
But don't worry – there is always the option of adjusting the size!
With these tips, you'll get as close as possible to the perfect size, and the surprise will be even more special. Have questions? We're here to help!