The size of front speakers on a 94 Mazda 121 are 130mm.
5x7 speakers
The 2014 Mazda MAZDA5 has a 2.5 L base engine size.
The 2014 Mazda MAZDA6 has a 2.5 L base engine size.
The 2014 Mazda MAZDA2 has a 1.5 L base engine size.
The 2014 Mazda MAZDA3 has a 2.0 L base engine size.
If you are referring to the stock size speakers they are 4x6 in all four positions
The front dash speakers in the 89 Mazda b series pickup trucks are 4".
The 2014 Mazda MAZDA6 has an inline 4 engine.
The 2014 Mazda MAZDA5 has an inline 4 engine.
The 2014 Mazda MAZDA2 has an inline 4 engine.
The 2014 Mazda MAZDA3 has an inline 4 engine.