what size is the spleen
Enlarged Spleen Overview. The spleen is an important organ in the immune system. It is a bean shaped structure, located in the left upper portion of the abdominal cavity, under the diaphragm, tucked in between the 9th and 11th ribs, in the mid-back. The spleen typically weighs 150 grams (5.3 oz) in a typical adult and spans about 11 cm (4.3 inches) vertically in its longest dimension.