What size speakers in 98 xj8 vdp l doors?

One of my speakers in blown so I am going to order some new ones. Does anyone know what size they are in the doors? This is the main speakers, not the tweeters. They are harmon kardon or w/e the upgraded sound system has.

I put 6 1/2 inch Polk Audio in my 98 XJ 8.....great sound
 
Don