sidhan

Standard DIN is 2 inch tall, and Double DIN is 4 inch tall.
DIN is the holder in which your current radio sits. If it's a single DIN radio with old style big push buttons, then you can get GCC specs radio from Sharjah used spare market for less than 50-100 AED than breaking your head to program the frequency and spending money on garage or required cables for DIY.
If it's a Double DIN, then it's awesome as with this excuse you can upgrade that to more modern player that comes with big screen entertainment and multiple connectivity options wih USB and Bluetooth to play any media. Cost from 300-500 AED with installation.