How to Choose the Perfect Diamond Shape for Your Engagement Ring

Last updated: October 1, 2026

Quick answer: For the most sparkle, choose a round, oval or radiant diamond. To make the stone look bigger for its carat weight, choose an oval, pear or marquise. For calm, understated elegance, choose an emerald or Asscher cut. For vintage romance, choose a cushion. In the US, round and oval are the most popular engagement ring shapes, with oval, pear and radiant leading for colored diamonds because they show color beautifully.

Diamond shapes at a glance

Shape	Sparkle	Looks bigger?	Personality
Round	Highest	Standard	Timeless and classic
Oval	Very high	Yes	Elegant and flattering
Pear	High	Yes	Romantic and distinctive
Marquise	High	The most	Bold and vintage
Radiant	Very high	Slightly	Modern and brilliant
Cushion	High, soft	Standard	Romantic and vintage
Princess	High	Standard	Crisp and contemporary
Emerald	Calm flashes	Slightly	Sophisticated and minimal
Asscher	Calm flashes	Standard	Art Deco and architectural
Heart	High	Standard	Playful and romantic

Round brilliant

The classic. Its cut is designed to return as much light as possible, so it gives the most sparkle of any shape. A timeless choice if you want a ring that will never feel dated. Try the Round Brilliant Diamond Solitaire.

Oval

Elongated and elegant, an oval has sparkle close to a round but looks larger for its carat weight and makes the finger appear longer and slimmer. It is also one of the best shapes for colored diamonds. Try the Oval Cut Diamond Solitaire.

Pear

Part round, part marquise, the teardrop shape is romantic and distinctive. Worn point-down toward the fingertip, it flatters the hand beautifully. Try the Pear Cut Diamond Solitaire.

Cushion

Softly squared with rounded corners, the cushion has a romantic, vintage feel and a warm, gentle sparkle. Try the Cushion Cut Diamond Solitaire.

Marquise

Long and pointed at both ends, the marquise offers the largest face-up look for its weight and a bold, statement silhouette. Try the Marquise Cut Diamond Solitaire.

Emerald and Asscher

These step-cut shapes trade fiery sparkle for clarity and calm, mirror-like flashes of light. Emerald is rectangular; Asscher is its square, Art Deco cousin. Both suit anyone who loves clean, architectural lines. Try the Emerald Cut Diamond Solitaire or the Asscher Cut Hidden Halo Solitaire.

Radiant

A rectangle or square with trimmed corners, the radiant combines the clean outline of an emerald with the brilliance of a round. It is also excellent for intensifying the color of pink, yellow and blue diamonds. Try the Radiant Cut Hidden Halo Solitaire.

How to decide

• Love sparkle? Choose round, oval or radiant.
• Want the stone to look bigger? Try oval, pear or marquise.
• Prefer understated elegance? Look at emerald or Asscher.
• Drawn to vintage romance? Cushion is hard to beat.
• Choosing a colored diamond? Oval, pear, radiant and cushion show color best. See our fancy color diamonds guide.

Once you have a shape, choose your setting with our guide to solitaire, pavé, hidden halo or three-stone, then pick your stone in lab-grown vs natural vs moissanite.

Frequently asked questions

Which diamond shape sparkles the most?

The round brilliant sparkles the most, followed closely by oval and radiant.

Which diamond shape looks biggest?

Marquise, oval and pear look the largest for their carat weight because their elongated shapes spread more surface area face-up.

What is the most popular engagement ring shape in the US?

Round and oval are the most popular engagement ring shapes in the US, with emerald, pear and radiant also in high demand.

Which shape is best for a colored diamond?

Oval, pear, radiant and cushion are excellent for colored diamonds because their faceting concentrates and displays color.