If you are not technically minded, you can simply measure the cavity in your vehicle and if it matches those dimensions, you have a single DIN and you need a single DIN universal car stereo. However, some vehicles have a double-DIN.

If you have a low-powered factory stereo (typically 10-15 watts RMS per channel or less), speakers with high sensitivity ratings (over 90 dB) will make the best match. If you have a high-power system like an aftermarket stereo or external amplifier, then consider speakers with lower sensitivity ratings.