A princess cut is a square shape with sharp, uncropped corners, combining the geometric clarity of a step cut with the brilliant faceting of a round diamond. It remains one of the most popular non-round shapes for engagement rings, prized for looking contemporary without sacrificing sparkle.
Princess Diamond Size Chart: MM to Carat
| Carat Weight | Approximate MM Size |
|---|---|
| 0.50 ct | 4.4mm x 4.4mm |
| 0.75 ct | 5.0mm x 5.0mm |
| 1.00 ct | 5.5mm x 5.5mm |
| 1.50 ct | 6.3mm x 6.3mm |
| 2.00 ct | 7.0mm x 7.0mm |
Figures assume a standard square princess cut. An IGI certificate confirms a specific stone's actual measurements.
Brilliance in a Square Shape
Unlike step cut shapes such as the emerald or Asscher, a princess cut uses a brilliant facet pattern similar to a round diamond, adapted to a square outline. The result is a shape that sparkles like a round brilliant while reading as more modern and architectural.
The Corners Need Protection
A princess cut's sharp, uncropped corners are its most vulnerable point, more prone to chipping during daily wear than a rounded or cropped shape. This makes setting choice a genuinely practical consideration, not just an aesthetic one.
Best Settings for a Princess Diamond
A four prong setting with a prong covering each corner is the standard, protective choice. A V shaped prong at each corner offers extra security for buyers who wear their ring daily without exception.
Explore Princess Cut Pieces
Browse Nivara's princess cut lab grown diamond rings, all IGI certified.
