Typical heart of an adult [1]:
4.7 in (12cm) in length
3.1 in (8cm) to 3.5 in (9cm) in breadth
2.4 in (6cm) in thickness
About as big as your fist
Not mine, but an average man's fist.
The average size of the human heart is as big as your fist.
big as the adult's heart
The Big heart
The Big Heart was created in 1945.
the humpback whales heart is as big as a small car
A big heart
If its just an average heart, that means she might like you or is just your friend. If its big or curly and curvy, that means she wants to get into a serious relationship.
There is no real size measurement for how big a pig's heart will get. However, they tend to be roughly the same size of a human's.
as big as a washer
Not that big