According to the search results, the normal size of the liver can vary depending on several factors such as age, sex, body size, and examination technique utilized. By percussion, the mean liver size is 7 cm for women and 10.5 cm for men. A liver span 2 to 3 cm larger or smaller than these values is considered abnormal. The liver weighs 1200 to 1400 g in the adult woman and 1400 to 1500 g in the adult man.

Another study published in the journal Indian Pediatrics measured the average liver length for boys and girls between the ages of 1 and 12 years using ultrasound evaluation. The study found that the average liver length for boys ranges from 2.6 in. (6.5 cm) to 5.0 in. (12.6 cm) depending on age, while the average liver length for girls ranges from 2.4 in. (6.2 cm) to 4.8 in. (12.3 cm) depending on age.

Overall, the size of the liver increases with age, from an average span of 5 cm at the age of five years to 15 cm in adulthood. However, the exact dimension of a normal liver span in the midclavicular line has been reported as anywhere from 6 cm to 15 cm but generally is considered as less than 12 cm.

In summary, the normal size of the liver can vary depending on several factors, but by percussion, the mean liver size is 7 cm for women and 10.5 cm for men. A liver span 2 to 3 cm larger or smaller than these values is considered abnormal.