In an article on Cosmopolitan.com, New York City plastic surgeon Matthew Schulman, MD says there are five different shapes of female butts in the world. The shapes are Round, A Shape, Heart, Square & V Shape. 

Dr. Schulman says your butt shape is determined by the placement of your pelvis and hip bones, the amount of fat you have and its distribution, the size of your underlying gluteal muscles, and the way your butt muscles attach to the thigh bone. The outcome is a butt that fits into one of five categories. 

Round

- Probably the most popular shape of butt, especially from Dr. Schulman's patients. This is mostly due to celebrities like Kim Kardashian, Beyonce, and Jennifer Lopez.

You Should Wear:

- A round butt requires extra fabric in the back for full coverage otherwise, the crotch of your underwear will just shift backward, which can lower the front waist band and trigger a frontal wedgie. Tangas and thongs, as well as briefs and boy shorts with four-way stretch, a center back seam, and ruching along that seam are ideal for contouring your butt cheeks.

A Shape

- "Pear-shaped" women tend to have A-shaped butts that widen below the hip bones, according to Dr. Schulman. 

You Should Wear:

 - Because A-shaped butts tend to stem from fuller thighs, the most comfortable underwear styles have high-cut legs with larger leg holes. Stick with tangas, bikinis, or boy shorts made from stretchy lace, or seamless, laser-cut edges — and avoid styles with elastic-edged leg holes, which can be binding and uncomfortable.

Heart

 - Similar to round booties, "it involves a curve to the outer hips, but with more volume in the lower part of the hip," according to Dr. Schulman. 

You Should Wear:

- Because your butt and hips are full, and your buns are set low, high-cut leg holes might not give your butt cheeks quite enough coverage. Go for briefs, boy shorts, hipsters, or bikinis with a lower-cut leg opening. If you're worried about looking saggy, make sure your underwear's leg openings cup the buns, hitting right below your butt crease for the illusion of an instant butt lift. 

Square

- If the line between your hip bone and outer thigh runs perpendicular to the ground, you have a square butt, according to Dr. Schulman.

You Should Wear:

- While styles designed to hit high on the thigh can ride up and result in a wedgie, boy shorts, bikinis, tangas, and thongs can be comfortable and flattering for women with square, flat butts.

V Shape

- If the line between your pelvis and hips angles inward, your butt takes on a "V" shape from behind, according to Dr. Schulman, who says this butt shape is common among women with broad shoulders and very narrow hips. 

You Should Wear: 

Stick with briefs, boy shorts, hipsters, or bikinis without high-cut leg holes, which won't provide quite enough coverage for your butt cheeks. Because a V-shaped butt can make your cheeks look like they're sagging, make sure your underwear's leg opening cups the bottom of your buns for extra definition. 

*This article originally appeared on Cosmopolitan.com