Meghan Markle steps out in Princess Eugenie's favorite pumps

When we start noticing a pattern of our favorite style icons sporting the same exact pair of shoes, we have no choice but to invest and do our research.

Italian-made brand, Sarah Flint, spotted on a slew of stars over the years -- from the Duchess of Sussex to the streets of New York a la Lady Gaga -- the "Perfect Pump 100" is now a cult-favorite and wardrobe staple due to the luxe comfort it affords women who wear them.

And while other classic pumps (ie: Manolo Blahnik's Hangisi and Christian Louboutin's Pigalle) will cost you upwards of $1,000, these soft Italian nappa leather heals retail for under $400.

Meghan Markle sported them in the Cabernet suede hue early Friday morning while at the Queen's Commonwealth Trust and One Young World roundtable discussions at Windsor Castle. She styled the shoes with a full monochromatic look keeping the color palette from head-to-toe.

Designed with extra foot bed padding and and support from anatomical arch, it's clear why Meghan Markle, Princess Eugenie, Karlie Kloss, Hilary Duff and Lady Gaga all swear by these pointed-toe pumps -- and they're not the only ones.

"I was debating whether to buy the Perfect Pump 100 in black leather and ended up caving to it. It was the best decision I ever made. I have gotten so many compliments and aside from beautiful and elegant, they are super comfortable. The cushion that supports the arch of the foot is great. I will definitely buy another pair in a different color soon. The fit was perfect," one customer wrote.

Sarah Flint 'Perfect Pump 100', $355

Another reviewer said "I wear pumps all day most days for work. I have found the perfect pumps for all day wear. Definitely will purchase other colors," while another echoed the all day wear. "Brilliant cushioning in this pump! The support makes wearing them all day a breeze. I typically buy an 8 medium US and found the 38.5 was perfect."

Sky-high heels aren't for everyone. When Meghan is off-royal duty, the Duchess opts for Sarah Flint's best-selling Natalie flat and the Grear sandals (also worn by Cindy Crawford and Halle Berry!)