Can you define the size of heart in inches?

Answer 1

The human heart is only about 5 inches in length. It weighs about 200 to 400 grams, depending on the age, weight and build of the person. Typically, an adult heart is about 300 grams.

If you want to find out what size your heart is, clench your fist. The sized of the heart is roughly equal to the size of your curled fist.

Answer 2

The modest size and weight of the heart belie its incredible strength and endurance. About the size of a fist, the hollow, cone-shaped heart has a mass of between 250 and 350 grams less than a pound.

Snugly enclosed within the mediastinum, the medial cavity of the thorax, the heart extends obliquely for 12 to 14 cm (about 5 inches) from the second rib to the fifth intercostal space. As it rests on the superior surface of the diaphragm, the heart lies anterior to the vertebral column and posterior to the sternum. The lungs flank approximately two-thirds of its mass lies to the left of the midsternal line; the balance projects to the right.

Its broad, flat base, or posterior surface, is about 9 cm (3.5 in) wide and directed toward the right shoulder. Its apex points inferiorly toward the left hip. If you press your fingers between the fifth and sixth ribs just below the left nipple, you can easily feel the apical impulse caused by the apex of your beating heart contacting the chest wall.

Source: A&P Book, Eighth Edition; Elaine N. Marieb, Katja Hoehn