An elongated cushion moissanite blends softened corners with a lengthened outline. Its ratio determines whether the stone feels close to a classic cushion, moderately elongated, or distinctly slender.

How cushion ratio is calculated

Divide the length by the width. A 9.5 × 7.5 mm cushion has a ratio of about 1.27.

Common elongated cushion ratios

• About 1.10–1.15: subtly elongated
• About 1.16–1.25: balanced elongated cushion
• About 1.26–1.35: visibly long and modern

There is no single ideal ratio. The preferred range depends on how much length the buyer wants while preserving the cushion’s soft outline.

Ratio and corner shape

Two cushions with the same ratio can look very different. Some have broad rounded corners and pillow-like sides, while others have straighter edges and smaller clipped corners.

Ratio and facet style

Brilliant, modified brilliant, and crushed-ice patterns can change how elongated proportions read. A long ratio with uneven light return may look less balanced than a slightly fuller stone with strong brightness.

Best overall choice

A ratio around 1.18–1.28 usually gives clear elongation while retaining the romantic cushion identity. More dramatic ratios should be judged by video and exact measurements rather than ratio alone.

Frequently asked questions

Is an elongated cushion the same as a radiant?

No. Cushions usually have softer sides and corners, while radiants tend to have straighter edges and more defined clipped corners.

Which ratio looks largest?

Face-up spread depends on both measurements and depth. A longer ratio may add visible length, but overall area should be compared using the actual millimeter dimensions.