Giga Mac The real Giga Big Mac does not look like this. In 2016, McDonald's released two larger Big Mac's in Japan, the Grand Big Mac and the Giga Big Mac. The Grand Big Mac is a Big Mac with larger patties for 30% more meat. A Giga Big Mac has 4 larger patties for 2.8 times more meat. A Giga Big Mac is basically a Mega Mac with bigger patties.