speaker size in gf8

as the title says, what size are the standard speakers in the gf8s??

guy that had mine before me fitted FLI speakers in but they are pure crap imo theres only 3 in it and one oem and the sound is better from the oem, i wanna redo my whole system as i do it on every car i get, i currently have the pioneer avh2400bt headunit (fantastic bit of kit) running a jakson 1000w amp in the boot with a 10 inch sub which will be getting a customfit box in the coming days.... will throw pis up of said system as soon as i have it built up again

This is something iv always wanted to do with my own, the last owner butchered 6x9 in the boot I have new replacement covers to go in just need to get the finger out and do it