Standard 5x7 or 6x8 sizes will fit the Miata. Please note whether you have a Bose or non-Bose speakers when attempting to replace them, as it will make a difference in terms of the speakers you need to purchase.
Standard speakers use a 4-ohm coil, but the Bose speakers, common on most Miatas require 1/2 ohm speakers.
It is also possible to fit 8" woofers directly into the doors. Visit clearwateraudio.com for Miata-specific, aftermarket speaker solutions.
What is the size of the rear speakers on daewoo lanos
6.5" speakers in the front
6 1/2 in. speakers!
The back speakers I know are a 6 x 9.
The speakers are probably 6" X 8".
The front speakers are 6 1/2" and rear speakers are 5 1/4"
4"
Which speakers? Kick panels, door or behind seats?
6x8
6 1/2
6x9 in.
6 by 8 but not to much of a choice in that size tho