How big is a glock bullet?

A Glock typically uses 9mm, .40 S&W, or .45 ACP cartridges, depending on the model. The 9mm bullet has a diameter of approximately 9.01mm, while the .40 S&W measures about 10.16mm, and the .45 ACP is around 11.43mm in diameter. The length and weight of these bullets vary, with 9mm bullets usually weighing between 115 to 147 grains, .40 S&W weighing about 165 to 180 grains, and .45 ACP typically weighing 230 grains.