They are 6", but they are not oval. Kia has buggered us again by fitting a cheap non-radial speaker. I have tried installing a 6" speaker but does not fit. The entire stock speaker housing fitted to the door must be removed, or you will have to cut your door-cover.
Removing the speaker housing creates a huge gap around the speaker port, witch allows dust and noise to creep in from the outside - not a good route.
I am interested in replacing my crappy stock thumpers with a more decent set, anybody have any further ideas or input?