For decades the McDonald's Big Mac has been the go-to order for hungry fast food fans.
And now the chain's staple burger may be about to get even bigger.
McDonald's is currently experimenting with the size of the classic dish in certain areas of America.
Customers in Ohio and Dallas can now purchase two new products: the super-sized Grand Mac and the slightly smaller Mac Jr.
If our friends across the pond approve, the new options could one day appear in branches around the world.
The Grand Mac, now available in America, consists of two 1/6th-pound beef patties and two slices of American cheese.
It comes served on a larger sesame seed bun than usual and is dressed with lettuce, onions and pickles.
The giant burger contains a hefty 890 calories, compared to a regular American Big Mac which has 540 calories.
At the other end of the scale, the Mac Jr is a single layer Big Mac and is slightly smaller than the original, containing 480 calories.
The fast food giant has kept pretty quiet about its worldwide plans for the new burgers, but a spokesperson told BuzzFeed: "We’re always evolving our menu and providing our customers with new and exciting food innovations and we look forward to learning more from this test."
Watch this space.