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.
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
Find the Best
64 mm
Ring width:
3.0 mm
Ring diameter:
16.9 mm
Your settings:
- RingGold
- Skin toneLight
- Ring diameter16.9 mm
- Ring width3.0 mm
- Finger length64 mm
Saved…
Diamond Size Charts
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
Round
Cushion
Marquise
Emerald
Top Recommended Vendors
Blue Nile 
Blue Nile is the largest and most well known internet jewelry seller. They have a very large exclusive online inventory. Their high quality images are catching up to James Allens' and their prices are amazing. Blue Nile is currently running a limited time sale offering 15% on settings site-wide. Click here to browse some great settings. 
Blue Nile is the largest and most well known internet jewelry seller. They have a very large exclusive online inventory. Their high quality images are catching up to James Allens' and their prices are amazing. Blue Nile is currently running a limited time sale offering 15% on settings site-wide. Click here to browse some great settings. What we love about them:
- No questions asked returns within 30 days of shipment. Blue Nile will send you a paid shipping label to return the ring.
- Lifetime Warranty
- Free Shipping
- Free prong tightening, repolishing, rhodium plating and cleaning every 6 months
- Provide insurance appraisal
- One free resizing within the first year of purchase
- High quality images of about half of their diamonds
- 24/7 Customer Service
- 100% credit towards future upgrades (must be at least double in value)
- Best in class fulfillment
James Allen James Allen is the leader in online diamond sales. Their imaging technology is the same as inspecting a diamond with a jeweler's loupe. They have the largest exclusive loose diamond inventory online and fantastic prices. They also have the nicest collection of lab created diamonds online. 
James Allen is the leader in online diamond sales. Their imaging technology is the same as inspecting a diamond with a jeweler's loupe. They have the largest exclusive loose diamond inventory online and fantastic prices. They also have the nicest collection of lab created diamonds online. 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