Large Intestine Thickness: Average Dimensions & Variations

The average thickness of the large intestine (colon) is about 1.5 to 2.5 centimeters (cm) in adults. The large intestine is typically thicker than the small intestine, which has an average thickness of about 0.5 to 1 cm. The thickness of the large intestine can vary depending on the individual and the region of the colon being measured.