As you're designing your dream engagement ring, one of the first decisions to tackle is what shape you want your diamond (or other precious stone) to be. Choosing the perfect cut comes down to personal taste, but there are certain pros that come with each diamond shape that may sway your opinion. Below we've outlined seven engagement ring diamond shapes to know—along with everything you should know about each one before making your decision.

Keep scrolling for the engagement ring diamond shapes every bride-to-be should know.

Round cuts are the most popular shapes for engagement rings due to their brilliance, light performance, and ability to offer maximum sparkle. In fact, they make up approximately three-quarters of all diamond purchases. However, round-cut diamonds also the most expensive. First, their popularity makes them more scarce, driving up the price. Second, the shape means that a lot of diamond is lost when cutting, also increasing the final price.

Celebrities with round cut engagement rings: Emily Blunt, Miranda Kerr, Chiara Ferragni, Kate Mara, Taraji P. Hensen, Emmy Rossum, Malin Akerman

Oval engagement rings, especially as a striking solitaire, have seen a surge in popularity as of late. Oval-cut diamonds boast a beautiful brilliance similar to rounds, however, their oval shape has a lengthening effect, accentuating long, slender fingers. Ovals are available in a variety of length-to-width ratios so you can determine the dimension most flattering on your finger and complementary to your setting.

Celebrities with oval engagement rings: Blake Lively, Hailey Baldwin, Devon Windsor, Julianne Hough, Felicity Jones, Ashley Greene, Rose Leslie, Caroline Wozniacki

Also called "teardrop," a pear-cut diamond gets its name because of its single point and rounded end. The unique shape is a way to make a bit more of a statement. Like ovals, pear-cut diamonds have a slimming effect on fingers, especially when they have an elongated length-to-width ratio.

Celebrities with pear engagement rings: Margot Robbie, Ariana Grande, Sophie Turner, Kaley Cuoco

An emerald-cut diamond is cut with rectangular facets, giving it its unique appearance. While emeralds vary in how rectangular they are, depending on their length-to-width ratio, if you prefer a perfect square, opt for an Asscher-cut diamond.

Celebrities with emerald cut engagement rings: Beyoncé, Amal Clooney, Kim Kardashian, Anne Hathaway, Sarah Jessica Parker, Liv Tyler, Katharine McPhee

Also known as "pillow-cut" diamonds, cushions have been popular for over a century. Cushion-cut diamonds have rounded corners and larger facets—two factors contributing to their brilliance. Cushions are available in both square and rectangular shapes.

Celebrities with cushion cut engagement rings: Karlie Kloss, Leighton Meester, Gabrielle Union, Erin Andrews, Kayla Itsines

Radiant-cut diamonds are known for their trimmed corners. You can play with the length-to-width ratio of a radiant to increase the rectangularity of the diamond.

Celebrities with radiant engagement rings: Megan Fox, Anna Kournikova

Asscher engagement rings are far less popular than other diamond cuts but no less stunning. Asschers are nearly identical to emerald cut diamonds, except they are square rather than rectangular. 

Celebrities with Asscher engagement rings: Jessica Alba

Next up, here's our diamond cut and clarity guide.