5"x7"... But not all 5x7's will fit. Go to crutchfield.com and cross-reference your vehicle. They'll be able to inform you of what brands will work and if any modifications are necessary... Good luck.
if i am not mistaken the front door speakers are 6 in a half inch and the back speakers are 6x8 inch speakers.
The speaker covers are held in with a screw, remove it and tilt it out away from where the screw was. then remove the screws holding the speaker in and remove the speaker.
The front speakers are a 5 1/4" inch component speaker located in the door. The back speaker is a 6"x9" located in the rear deck.
4 inch front speakers and 5 inch rear speakers
Pull off the door panel, unscrew the stock/old 6.5 inch speaker, disconnect the speaker wiring and connect the new speaker. Screw the speaker in the hole in the door and replace the door panel.
In a 1995 Ford F-250, the radio battery constant 12v+ wire is green/yellow, the radio accessory switched 12v+ wire is yellow/black, the ground wire is red or black, and the illumination wire is blue/red. For the front speakers, the left front speaker wire (+) is orange/green, the left front speaker wire (-) is black/white, the right front speaker wire (+) is white/green, and the right front speaker wire (-) is black/white. For the rear speakers, the left rear speaker wire (+) is pink/green, the left rear speaker wire (-) is pink/blue, the right rear speaker wire (+) is pink/blue, and the right rear speaker wire (-) is green/orange.
Radio Constant 12V+ Wire: Blue/Yellow Radio Switched 12V+ Wire: Gray Radio Ground Wire: Brown Radio Illumination Wire: Green Radio Dimmer Wire: N/A Radio Antenna Trigger Wire: Black/Red Radio Amp Trigger Wire: None Front Speakers Size: 5 1/4″ Front Speakers Location: Doors Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speakers Size: 6″ x 9″ Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
Radio Constant 12V+ Wire: Blue/Yellow Radio Switched 12V+ Wire: Gray Radio Ground Wire: Brown Radio Illumination Wire: Green Radio Dimmer Wire: N/A Radio Antenna Trigger Wire: Black/Red Radio Amp Trigger Wire: None Front Speakers Size: 5 1/4″ Front Speakers Location: Doors Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speakers Size: 6″ x 9″ Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
The front door speakers in your 1995 Nissan are four inches by six inches. The front dashboard speakers are 4.5 inches in diameter.
in the wire hrnes at front of intake plenum
All speakers are 6.5"
Radio Constant 12V+ Wire: Blue/Yellow Radio Switched 12V+ Wire: Gray Radio Ground Wire: Brown Radio Illumination Wire: Green Radio Dimmer Wire: N/A Radio Antenna Trigger Wire: Black/Red Radio Amp Trigger Wire: None Front Speakers Size: 5 1/4? Front Speakers Location: Doors Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speakers Size: 6 1/2? Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White