Try It On

Try It On Tool

Our tool will help you determine the right diamond size. Simply enter your desired carat size (or dimensions) and shape in the fields below. The exact diamond shape will show up on the model finger which can be customized by adjusting the finger size or ring width.Once you've found the right size, click the button in the "Find the Best" and we'll help you find the right diamond for the best value.

Enter either the carat weight or the dimensions of a diamond

× ×

carat shape length width depth

Diamond on a left finger Actual Size

  • Cutting style

    Brilliant

  • Weight

    1 ct

  • Measurements

    6.5 × 6.5 × 3.92 mm

  • Total depth

    60.3% → ok

  • L/W ratio

    1

  • Face-up size

    Adequate

  • Find the Best

    1 ct Round


Left finger image
Ring on a left finger
Diamond on a finger
64 mm

Ring width:
3.0 mm

Ring:Skin tone:

Ring diameter:
16.9 mm

Or choose size:

Round diamond side view Left ring side view
Your settings:
  • Ring
    Gold
  • Skin tone
    Light
  • Ring diameter
    16.9 mm
  • Ring width
    3.0 mm
  • Finger length
    64 mm

Saved…

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Find the Best

Submit the diamond size and shape that you're looking for to receive personalized advice from our experts.
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Diamond Size Charts

Top Recommended Vendors
To help you compare different carat sizes, we created the preview charts
below for the most popular shapes including: Princess, Round, Cushion,
Marquise and Emerald.

To see sizes for all diamond shapes, click on the button below to download our
full printable diamond size chart.
Download All Sizes

Princess

diamond-size-chart-princess-cut

Round

diamond-size-chart-round-cut

Cushion

diamond-size-chart-cushion-cut

Marquise

diamond-size-chart-marquise-cut

Emerald

diamond-size-chart-Emerald-cut

About the author
Mike learned the diamond business from the ground-up at Leo Schachter Diamonds - one of the world's top diamond manufacturers. He has been recognized as a diamond industry expert by Time, PeopleMoney, The Daily Mirror, NerdWallet, The Times Herald, Yahoo Finance Australia, The Art of Charm, The Washington Diplomat, The Next Web, and more. See more
Top Recommended Vendors
Blue Nile Blue Nile is the largest and most well known internet jewelry seller. They have the industry-leading largest available exclusive online inventory. Their high quality images are catching up to James Allens' and their prices are amazing. Exclusive to us for the 2018 Christmas shopping season - Pick Up a single-use Blue Nile Coupon Here for $100 off!
What we love about them:
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  • High quality images of about half of their diamonds
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  • 100% credit towards future upgrades (must be at least double in value)
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James Allen James Allen is the leader in online diamond sales. Their imaging technology is at the point where it's almost the same as inspecting a diamond with a jeweler's loupe. Their customer experience is best in class, and they have recently upgraded their non-engagement jewelry inventory as well. Take advantage of their ongoing 25% Off Holiday Sale.
What we love about them:
  • No questions asked returns within 30 days of shipment. James Allen will send you a paid shipping label to return the ring.
  • Lifetime Warranty
  • Free International Shipping
  • Free prong tightening, repolishing, rhodium plating and cleaning every 6 months
  • Provide insurance appraisals
  • One free resizing within 60 days of purchase
  • Free ring inscriptions
  • Best-in-class high quality imagery of all diamonds in stock
  • 24/7 Customer Service
  • Best-in-class packaging
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