What is the dia. of a .22 cal. bullet?

The diameter of a .22 caliber bullet is approximately 0.22 inches, which is equivalent to about 5.56 millimeters. This measurement refers to the bullet itself, while the term ".22 caliber" typically encompasses various types of ammunition, including .22 Long Rifle, .22 Short, and .22 Magnum, all of which have similar bullet diameters.