What size are the stock speakers in a 2008 infiniti G35?

The stock speakers in a 2008 Infiniti G35 typically include 6.5-inch speakers in the front doors and 6.5-inch speakers in the rear doors as well. The car may also have a subwoofer, which is usually around 8 inches in size, depending on the audio package. These sizes are standard for the factory audio system in this model.