They are 5x7 or 6x8. Either work.
front speakers are 3.5 inch in the dash. The doors can have 6.5 added in if you want but there are no provisions for them stock
6x9 in the front doors, 5.25" in the rear doors. The stock infinity speakers are problematic.
Correct STOCK size is 5" x 7" for front and rear speakers. You have to cut the doors metal to make 6x9 speakers fit. REFERENCE : http://www.modifiedlife.com/1999-ford-explorer-car-radio-stereo-wiring-diagram/
The front speakers sre 6 1/2
in the front doors their 6 1/2 in the back for a pickup their 4x10
5.25 in the front, 6X9 in the rear, for ALL park avenues 91-04, they have tweeters in the front doors as well
Usually 6.5" in the front doors and 6x9 in therear deck. Best to check the stock ones before purchasing speakers. They could end up being 5.25" in the front and 5x7 in the rear deck.
the stock speakers are 4x6 inches
6.5" front and rear door speakers
The front speakers is 4x6, and the rear speakers is 6x9.
6x9 in the doors and the rear