Gallbladder 5.0cm*1.2cm is not necessarily gallbladder atrophy, it may also be caused by the presence of congenital factors, inaccurate test results and other conditions. 1. Gallbladder atrophy: under normal circumstances, the length of the gallbladder is between 5-8cm and the width is between 3-5cm. If the gallbladder is smaller than this value and the wall of the gallbladder is thickened, the gallbladder atrophy may be caused by chronic cholecystitis, or it may be caused by gallstones in the neck of the gallbladder. 2. Congenital factors: some people are born with small gallbladder, which is not atrophy and will not affect normal life. 3. Inaccurate test results: If the test is done after eating, the result will be inaccurate. The gallbladder will contract strongly after eating, and once contracted, it will become smaller. It is necessary to repeat the test again on an empty stomach, if the test is still small, it may be caused by atrophy or other causes. Since the size of the gallbladder is related to a number of factors, it is recommended to consult a doctor to find out the specific cause of the disease in order to avoid delays.