White Castle, the iconic restaurant that helped make the hamburger a quintessential American meal, recently surpassed a mind-blowing milestone: all-time sales of its burgers just eclipsed the 29 billion mark.

That includes sliders sold in restaurants and through food retailers nationwide, according to a press release.

In 1921, White Castle, became the first fast-food hamburger chain in the U.S., introducing customers to the small-sized hamburger that would become known as The original slider. Forty years later, in 1961, White Castle became the first fast-food chain to reach 1 billion burgers sold, according to the release.

“The thought of 29 billion can be difficult to grasp, but when you break it down, it all begins with one idea from a pioneer 102 years ago and one tasty little burger,” Jamie Richardson, vice president at White Castle, said in the release. “Our recipe for success is treating every burger sold like it is someone’s first time experiencing White Castle. Whether you’re a first-time customer or a lifelong Craver, hot and tasty 100% beef steam grilled on a bed of onions served on a bun from our own bakeries is what you’re craving, and satisfying that craving is what White Castle has delivered, 29 billion times over.”

Some fun ways to visualize 29 billion White Castle sliders include:

• Stacking them vertically on top of the other would reach 7.5 billion feet tall, or more than 260,000 Mt. Everests.
• Placing them end-to-end would stretch more than 1.4 million miles, or three round trips from Earth to the moon and back. They would also circle the Earth over 57 times.
• Laid flat, the 29 billion sliders would cover a land area equivalent to Washington, D.C.
• In terms of volume, the 29 billion sliders would fill nearly eight Empire State Buildings!

White Castle’s menu has become synonymous with slider-sized sandwiches. Today’s restaurants offer a wide array of sliders, from beef and chicken to fish and plant-based protein. Five type of Sliders, including original beef and chicken sliders, are sold in food retailers in all 50 states.

“Whether you’re enjoying a six-pack from the freezer aisle of your local grocer or a crave case with your friends at your local Castle, you can always count on great value and quality when you enjoy a White Castle slider,” Richardson said in the release. “That’s how we sold our first billion Sliders, and that’s how we’ll get to 30 billion sliders sold.”