According to USA Today, the total uncooked weight of the Big Mac's two beef patties is 3.2 ounces, while the Big King's patties now weigh in at 4 ounces.
As to how much bigger the upgraded Big King is than the previous version, the chain doesn't mention but a quick look at the new nutritional information compared to the information at launch shows an increase of... 1g of protein and 8g of weight, which amounts to about .3 ounces of extra cooked beef.
Still, the suggested retail price of the Big King remains the same (at $3.69) and it is currently offered as part of a two for $5 deal.
Here's the nutritional information for the previous and current Big King burgers:
Nutritional Info - Burger King Big King - less beef version (190g)
Calories - 510 (from Fat - 260)
Fat - 29g (Saturated Fat - 10g)
Sodium - 780mg
Carbs - 38g (Sugar - 8g)
Protein - 18g
Nutritional Info - Burger King Big King - new version with a quarter pound of beef (198g)
Calories - 530 (from Fat - 280)
Fat - 31g (Saturated Fat - 11g)
Sodium - 790mg
Carbs - 38g (Sugar - 8g)
Protein - 19g
Calories - 530 (from Fat - 280)
Fat - 31g (Saturated Fat - 11g)
Sodium - 790mg
Carbs - 38g (Sugar - 8g)
Protein - 19g