if they're the same as in the 1996 Avalon, then they're probably 4-inch door-mounted speakers. You can check Crutchfield.com for sizes and brands that will fit.
All the door speakers are 4' in size for replacement.
5 1/4
Both the front and rear are 4" door speakers, although it is not unheard of to fit 5.25" speakers in the front, and 6" in the back. Hope this helps!
6-3/4" Try 6.5".. they're 6 3/4
4 by 10 pioneer makes a some 4 by 10 if you wanted to buy some better than stock speakers
Answer96 Avalon XLS with 6speaker system ,4 4" in the doors and 2 1" tweeters frontTry to use Toyota speaker adapter plugs so you don't need to cut wires and mess the electric system up. You can get them from Ebay or Amazon.
Or you could go with the stock 4.5 in. speakers. Kenwood makes a great one in this size, you will get a good clean sound, that you might want to add some base to with a additional subwoofer. 1995-1999 Toyota Avalon will fit 5 1/4" stereo speakers but you will need to cut-away some of the plastic case that they are mounted in to make this size fit properly.
The 2013 Toyota Avalon-Hybrid has an inline 4 engine.
The 2014 Toyota Avalon-Hybrid has an inline 4 engine.
The front speakers are 4" and the rear speakers are 5 1/4 "
The correct size for the front speakers on a 1994 Apsire is 5 1/4" speakers.
the speakers in the thunderbird are standard paper cone speakers. They are not 3-way though the stock amp in my 95 had plenty enough to drive 4 4-way speakers that i put in it.