3-1/2"
The two front speakers are 3.5" and the two rear speakers are 6"x9"
6.5" front and rear door speakers
6 1/2 front and rear
3-1/4 in front 4 x 10 in back
in the front doors their 6 1/2 in the back for a pickup their 4x10
3-1/4 in front 4 x 10 in back
The stock front door speakers on 97- 01 lumina are 5.25 round but the depth of the speaker is an important dimension since the speaker is front mounted in an enclosure which is mounted to the door. I replaced my stock speakers with Sony Xplod model XS-R1342. Any 8 ohm model speaker with similar dimensions will work.
Stock speakers should be 4x6's
go to crutchfield.com and they should tell you the speaker sizes for your vehicle.
not th stock one
1997 Chevrolet Cavalier LS Front and Rear Tires P195/65R15 1997 Chevrolet Cavalier Base Model Front and Rear Tires P195/70R14 1997 Chevrolet Cavalier Z24 Front and Rear Tires P205/55R16 Read more at the Related Question.
the size of the speakers are 6.5" round