How Big Will A Diamond Ring Look On My Finger December 7, 2015 – Posted in: Jewelry Blog

Are you trying to work out how big a diamond will look on your finger? If yes, don’t worry. We agree that it’s hard to know. Most shoppers won’t know if a diamond is 1-carat or 3-carats!

The good news is that we have solved the problem. You can now see pictures of all the diamond sizes.

In this article, you’ll be able to look at a model wearing different-sized diamond rings.

Diamond Engagement Ring Size on Finger

The calculations below are based on the average finger size of 6.5 which equals 16.9mm (or 17mm to make the math easier). If your finger is larger than a size 6.5, the diamond will look a little smaller than described below. If your finger is smaller than a size 6.5, your diamond will look larger than described in each description below.

0.50-carat Engagement Ring on a Finger

Assuming that the average finger width (based on a size 6.5 finger size) is 17mm, a 0.50-carat diamond will appear to cover 30% of the width of the finger. A round-cut 0.50-carat diamond has a width of 5.2mm.

The 0.50-carat diamond is the smallest diamond that is typically used in a solitaire mounting. In general, our jewelry experts always recommend setting diamonds under 0.70-carats with a halo of diamonds surrounding them.

To view our collection of 0.50-carats please click here.

  • Old European and Baguette Cut Diamond Ring - Wellington Ring 13744 TV
    The Wellington Ring
    $12,500
  • 0.76ct Old European Cut Diamond Engagement Ring Elm Park Ring Top View 13652_TV
    Elm Park Ring. Circa 1955
    $5,800
  • 0.50ct Old European Cut Diamond and Sapphire Halo Central Park Ring
    Central Park Ring
    $3,600
  • Diamond and Platinum Cluster Ring Madrid Ring Top View
    Madrid Ring
    $5,700

1-carat Engagement Ring on a Finger

Assuming that the average finger width is 17mm, a 1-carat diamond will appear to cover 38.2% of the width of the finger. A round-cut 1-carat diamond has a width of 6.5mm.

The 1-carat diamond has enough size to typically look noticeable on the finger. It is usually the starting milestone size for anyone looking to get a serious diamond. The 1ct diamond covers more than 1/3 of the width of the finger.

To view our collection of 1.00-carat diamond engagement rings, click here.

  • 1.11ct Diamond Art Deco Ring Rankwell Ring
    Rankwell Ring. Circa 1930
    $9,800
  • 11614 Sydney Diamond Engagement Ring TV
    The Sydney Ring
    $8,000
  • New York Asscher Cut Diamond Engagement Ring in Platinum
    New York Ring
    $9,800
  • Diamond and Sapphire Art Deco Style Denmark Ring 11998 TV
    The Denmark Ring
    $9,500

1.50-carat Engagement Ring on a Finger

Assuming that the average finger width is 17mm, a 1.50-carat diamond will appear to cover 43.5% of the width of the finger. A round-cut 1.50-carat diamond has a width of 7.4mm.

As you can see in the photo below, the 1.50-carat is already considered a comfortably sized diamond. It is still very popular for 1.50-carat diamonds to be surrounded by a halo of diamonds, but 1.50 is already large enough for the center diamond to stand proudly on its own.

To view our collection of 1.50-carat engagement rings, click here.

  • Round Brilliant Cut Natural Ruby Halo Engagement Ring 13697_TV
    Ruby Halo Engagement Ring
    $5,700
  • Chester Ring Top View
    Chester Ring
    $12,000
  • Antique Barcelona Ring
    Barcelona Ring. Circa 1920
    $19,500
  • London Ring Top View
    London Ring
    SOLD

2-carat Engagement Ring on a Finger

Assuming that the average finger width is 17mm, a 2-carat diamond will appear to cover 48.2% of the width of the finger. A round-cut 2-carat diamond has a width of 8.15mm.

The 2-carat engagement ring fills up almost the width of half the finger. It is prominent and bold. Like the 1.50-carat diamond, it doesn’t need a halo, but a halo will still add to the 2-carats presentation.

Click here to view our collection of 2-carat engagement rings.

  • Round Brilliant Diamond and Platinum Engagement Ring - Rouen Ring
    Rouen Ring
    $19,000
  • D color old European cut Diamond Ring Aveyron Ring 10660
    Aveyron Ring
    $52,000
  • 2ct Old European Cut Diamond Ring Everett Ring
    Everett Ring
    SOLD
  • Scottsboro Ring Top View
    Scottsboro Ring
    SOLD

2.50-carat Engagement Ring on a Finger


Assuming that the average finger width is 17mm, a 2.50-carat diamond will appear to cover 51.4% of the width of the finger. A round-cut 2.50-carat diamond has a width of 8.70mm.

The 2.50-carat diamond will fill up more than half the width of your finger. This sized diamond is already considered large. A halo would add to the diamond, but is necessary at all to add to the illusion.

Click here to view our collection of 2.50-carat engagement rings.

  • 2.41ct Old European Cut Diamond Engagement Ring Top View 13641_TV
    Moreland Ring. Circa 1940
    $22,500
  • 2.41ct diamond Art Deco Ring Athens Ring
    Athens Ring. Circa 1920
    $25,000
  • 1.87ct Diamond and Emerald Ring Luso Ring 11960
    Luso Ring
    $25,000
  • Edwardian 2.50 Carat Old European Diamond Ring - Middletown Ring 13842 TV
    Middletown Ring. Circa 1910
    $21,500

3-carat Engagement Ring on a Finger

Assuming that the average finger width is 17mm, a 3-carat diamond will cover 55.3% of the width of the finger. A round-cut 3-carat diamond has a width of 9.35mm.

The 3-carat diamond is a beautiful size. It’s notable but not flashy. It’s the perfect size for someone who wants to have a prominent-sized diamond ring, without looking gaudy or ostentatious.

View our collection of beautiful 3-carat engagement rings.

  • Diamond and Sapphire Accent Ring Tournus Ring Top View
    Tournus Ring
    $36,000
  • Victorian Cluster Diamond Ring Stockton Ring Top View
    Stockton Ring. Circa 1880
    $55,000
  • 3.63ct Antique Cushion cut Ring Montreal Ring
    3.63Ct Montreal Ring
    $45,000
  • Oakland Ring Top View
    Oakland Ring
    SOLD

4-carat Engagement Ring on a Finger

Assuming the average finger width is 17mm, a 4-carat diamond will cover 60.70 of the width of the finger. A brilliant-cut 4-carat diamond has a width of 10.32mm.

View our collection of beautiful 4-carat engagement rings.

  • 4.37ct Old European Cut Diamond Halo Ring - Shoreham Ring 13813 TV
    Shoreham Ring
    $65,500
  • Antique 3.90ct Diamond Ring Boudry Ring Top View
    Boudry Ring. Circa 1920
    $42,000
  • 4.73ct Vintage Diamond Engagement Ring RJ2506 TV
    Beckton Ring. Circa 1950
    $56,000
  • 4.02 Carat Top View
    4.02 Carat Diamond Ring
    $54,000

5-carat Engagement Ring on a Finger

Assuming that the average finger width is 17mm, a 5-carat diamond will cover 64.5% of the width of the finger. A round-cut 5-carat diamond has a width of 10.90mm.

A 5-carat diamond is large and stunning. This diamond size is not for someone unassuming who wouldn’t want anyone to notice their ring. It won’t cover your entire finger (an 18-carat diamond will), but it will look bold and lovely.

Click here to view our 5-carat engagement rings.

  • 5.72ct Diamond and Sapphire Halo Ring - Golders Green Ring SM315 TV
    Golders Green Ring
    $85,000
  • 4.30 Carat Diamond Engagement Ring with Onyx Halo 13423 TV
    Kent Ring. Circa 1925
    $45,000
  • 5.87 Carat Rose-Cut Diamond and Platinum Ring Norristown Ring 13073
    Norristown Ring
    $92,000
  • 12139 Top View
    5.02ct Estate Halo Ring
    $58,000

6-carat Engagement Ring on a Finger

Going on the assumption of the average finger is 17mm, a 6-carat diamond will cover 68.82% of the width of a finger. A round-cut diamond that has a width of 11.70mm.

A six-carat engagement ring will look bold on anyone that wears it, whether they are a size 4 or size 9.

Click here to view our collection of 6-carat engagement rings.

  • 5.01ct Antique Cushion Cut Engagement Ring - Bellmore Ring 25358 TV
    Bellmore Ring
    Contact For Price
  • 8.29ct Antique Cushion Cut Diamond Platinum Ring - Sussex Ring
    Sussex Ring
    Contact Us
  • Genesee SB9808 Asscher Cut Diamond Engagement Ring
    Genesee Ring
    Contact Us For Price
  • 6 carat diamond and platinum ring Garland Ring Top View
    Garland Ring. Circa 1930
    $90,000

Understanding the Above Pictures

Artistic Photo of Diamond Ring on Finger
This picture shows a 1.13-Carat Diamond with a Halo of sapphires surrounding it

A diamond is a beautiful stone regardless of size, shape, or placement, but when sizing an engagement ring on a finger, each stone needs to be taken into consideration. Obviously, hand sizes and finger widths can be different, so understanding how a ring will look from an image is a complex matter.

To help, we’ve provided a brief explanation of the factors at play, as well as a few pictures of differently sized rings being worn so you can visualize how a ring might look on you.

Diamonds Sizes

Watch a video that shows how big different-sized diamonds appear on the finger
Understanding Carat Diamond Sizes on Finger

Diamonds are measured in carats, which refer to the weight of the stone. One carat is approximately one-fifth of a gram or 200 milligrams. Diamond carats are typically measured in increments of 0.25. A stone could measure anywhere between a fraction of a carat to multiple carats. Unfortunately, those numbers are somewhat meaningless until you can see the stone in an engagement ring on a finger.

Ring Settings

1 Carat Diamond on Hand

A vintage solitaire engagement ring traditionally consists of a single stone in a simple mounting. The solitaire ring focuses all the attention entirely on the beauty of the diamond. Some prefer to adorn a single diamond with smaller stones to create a halo. Halos give an increased sense of size and brilliance when looking at the engagement ring on a finger.

Diamonds can also be prong-set or bezel-set. A prong set ring is held in place with small metal prongs and bezel-set rings are encased in metal. The popular, prong-set, single-solitaire vintage engagement ring was first popularized by Tiffany and Co. in the 1880s. A bezel setting will run around the entire perimeter of the diamond.

Finding The Right Size

Customer Looking at Large Diamond with Halo in Showroom with Afshin in Corner

To summarize, the cost, style preference, and of course, an individual’s finger dimensions all naturally factor into the decision when buying a ring. That’s why seeing an engagement ring on a finger is much more useful than looking at loose stones or pictures of jewelry when shopping for engagement rings. To help you visualize how some commonly sized rings would look on your finger before you enter the showroom, we’ve included the images below.

The Ultimate Test

Customer looking at halo diamond engagement ring on finger in showroom

Of course, the best way to determine how an engagement ring will look and fit on your finger is to try it on in person. Visit us at our showroom in midtown New York, or try out our home viewing program, and we’ll be happy to help.

In conclusion, everyone’s finger size is different. Something as simple as the shape of your hand may change the illusion of the size of the diamond on your finger. If you want to know with certainty how large a particular diamond ring will appear, you will need to try it on.

You can share this image below on Pinterest.

Definitive Guide to Diamonds on the Finger

Have any comments? Feel free to comment below!