99 Expedition Speakers

I wanted to replace my stock speakers. There are two in the front and two in the middle seat. The front door speaker covers say "Premium" but I don't think there is anything special about them. Does anyone know what size they are? Are the front door and middle door the same size or is one smaller or larger than the other?

Don't quote me on this, I think their 6x8. Go on www.crutchfield.com (http://www.crutchfield.com) they show what fits.