Visual tool
Diamond Size Visualizer
Carat is weight, not size. A 2-carat diamond looks bigger than a 1-carat — but only ~25% wider, not "twice as big." See it side by side.
1.00ct round brilliant · approximately 6.5mm across the top
The numbers above are face-up diameters for a well-cut round brilliant. Other shapes vary:
- · Princess: similar diameter, square outline
- · Oval: ~10% wider, ~15% longer than a round of the same carat
- · Marquise: ~25% longer, ~10% narrower than a round of the same carat
- · Emerald: ~5% wider in length, narrower across the width
Rule of thumb: a 1ct stone fills the gap between two finger knuckles on most hands.