What is the bullet size of 38 revolver?

The bullet size for a .38 revolver typically refers to the .38 Special cartridge, which has a bullet diameter of approximately .357 inches (9.07 mm). Some .38 revolvers can also chamber .357 Magnum cartridges, which have the same bullet diameter but are longer and generate higher pressure. The .38 Special is commonly used for target shooting and self-defense due to its manageable recoil.