As the default, you will get the normal size of launcher icon size. For better and attractive use if you want to make launcher icons size the little bit larger than you can use these steps.
Launcher means where you can get different options to control your computer. In Ubuntu, you don't get start menu like on Windows. It's complete different operating system.
Ubuntu includes a launcher on the left of your screen. If it appears that the size of the icons on the launcher is either too small or too big, you can adjust it to the size you like.
- Go to "System Settings".
- Hit for Appearance" under "Personal".
- Under "Lock" you will get launcher icon size : you can either increase and decrease the size of your launcher icons.