What is the size of the heart?

• A. About the size of a grapefruit.
• B. About the size of a clenched fist.
• C. About the size of a tennis ball.
• D. About the size of a peach.

Answer: (B)

The size of the heart is best described as about the size of a clenched fist. This aligns with how large the heart typically is in an adult—roughly 250–350 grams and about 12 cm long—so it fits nicely within the chest cavity and has enough muscle to pump blood effectively. The other options depict objects that are noticeably larger or smaller than the heart: a grapefruit is much bigger, a tennis ball is smaller, and a peach is also generally smaller or differently shaped than the heart. So, the clenched-fist size is the most accurate and commonly taught comparison.