Diamond Size Visualizer
See exactly how a diamond looks worn, before you buy. Pick a shape and drag the slider from 0.25 carat to 8 carats to compare how each carat weight actually sits on a hand - a true-to-scale diamond size chart you can see rather than just read.
Every shape and carat weight above is its own individually rendered diamond image - 207 in total (9 shapes × 23 carat weights) - not one photo digitally zoomed or stretched to fake a size. Proportions stay accurate at every size you compare.
Understanding diamond carat weight
Carat measures a diamond's weight, not its width - so two diamonds of the same carat weight can look different sizes depending on their shape and cut proportions. As a general reference, here's roughly how wide a well-cut round brilliant diamond is at common carat weights. Figures are approximate industry averages, not exact for every stone, and elongated shapes like oval, pear and marquise typically appear larger than round at the same carat weight - use the visualizer above for an accurate comparison by shape.
| Carat Weight | Approx. Diameter (Round) |
|---|---|
| 0.25 ct | ≈ 4.1 mm |
| 0.50 ct | ≈ 5.2 mm |
| 0.75 ct | ≈ 5.8 mm |
| 1.00 ct | ≈ 6.5 mm |
| 1.25 ct | ≈ 6.9 mm |
| 1.50 ct | ≈ 7.4 mm |
| 1.75 ct | ≈ 7.8 mm |
| 2.00 ct | ≈ 8.2 mm |
| 2.25 ct | ≈ 8.5 mm |
| 2.50 ct | ≈ 8.8 mm |
| 2.75 ct | ≈ 9.1 mm |
| 3.00 ct | ≈ 9.4 mm |
| 3.25 ct | ≈ 9.6 mm |
| 3.50 ct | ≈ 9.8 mm |
| 3.75 ct | ≈ 10.1 mm |
| 4.00 ct | ≈ 10.4 mm |
| 4.50 ct | ≈ 10.9 mm |
| 5.00 ct | ≈ 11.2 mm |
| 5.50 ct | ≈ 11.7 mm |
| 6.00 ct | ≈ 12.1 mm |
| 6.50 ct | ≈ 12.5 mm |
| 7.00 ct | ≈ 12.8 mm |
| 8.00 ct | ≈ 13.5 mm |
Frequently asked questions
Is this a real diamond photo, or just one image zoomed in and out?
Real images throughout. Every combination of shape and carat weight - 207 in total, across all 9 shapes and 23 carat weights from 0.25ct to 8ct - is its own individually rendered diamond image, not a single photo digitally scaled up or down. That's what keeps the proportions accurate as you move the slider, instead of a fake diamond that just gets bigger and bigger on screen.
Does a 2 carat diamond look twice as big as a 1 carat diamond?
No. Carat is a unit of weight, not size, and a diamond gains weight in three dimensions as it grows. A 2 carat round diamond is roughly 8.2mm across versus about 6.5mm for 1 carat - noticeably larger, but nowhere near double the visible diameter. Use the visualizer above to compare any two carat weights directly rather than estimating from the number alone.
Does diamond shape affect how big a carat weight looks?
Yes, significantly. Elongated shapes like oval, pear and marquise spread the same carat weight over more visible surface area than a round diamond, so they tend to look larger face-up at an identical carat weight. This is one of the main reasons to compare shapes side by side rather than assuming carat weight alone determines how large a diamond looks.
What carat size looks best on a narrow finger versus a wider finger?
A given carat weight generally reads as larger and more prominent on a narrower finger, and comparatively more proportionate on a wider one. Setting style matters too - a halo or elongated shape can make a smaller center stone look more substantial regardless of finger width.
Is a 3 carat diamond too big for everyday wear?
Not inherently - it depends on the setting and your lifestyle more than the carat weight itself. A low-profile setting wears more comfortably day to day than a high halo at the same carat weight. If you're unsure, a Candor gemologist can walk through specific settings with you on a virtual appointment.
How can I tell what carat weight will actually suit my hand before buying?
The most reliable way without an in-person try-on is a true-to-scale visual comparison - which is exactly what this tool does: it overlays an accurately scaled diamond of your chosen shape and carat weight onto a real hand photo. For a second opinion, Candor also offers a complimentary virtual appointment with a gemologist.
Want a second opinion, or help comparing shapes and settings in person over video?
Book a complimentary virtual appointment with a Candor gemologist