At least fot the 96 its a 6 and one half inch speaker.
4inch in front r-l grill easy installation but very shallow
6.5 inches
The 1991 Geo Metro typically comes with 4-inch speakers in the front doors and rear. Depending on the trim level and options, the vehicle may also accommodate larger aftermarket speakers. For optimal sound quality, many owners choose to upgrade to slightly larger speakers while ensuring they fit within the existing mounting locations.
The rear speakers are the same size of the front. 6.75" but 6.5" will work also
The door speakers in Geo Prizms From 1993-1997 and possibly newer are 4in. and the rear speakers are 6.5in.
4
26R
don't know what size it is
13 inch
front of the engine
Can you swap a 93 Geo metro manual transmition with a 95 Geo Metro
6 3/4