The gallbladder is a small, pear-shaped organ located beneath the liver. Its typical size in adults is about 7 to 10 centimeters (2.7 to 3.9 inches) in length and approximately 4 to 5 centimeters (1.6 to 2 inches) in diameter at its widest point when fully distended

. It usually holds about 30 to 80 milliliters (1 to 2.7 fluid ounces) of bile

. In summary:

• Length: 7 to 10 cm (2.7 to 3.9 inches)
• Width/Diameter: 4 to 5 cm (1.6 to 2 inches)
• Capacity: 30 to 80 ml (1 to 2.7 fluid ounces)

This size allows it to store and concentrate bile produced by the liver, which is then released into the small intestine to aid in digestion, particularly the breakdown of fats