How To Change Mouse Cursor Size And Theme Under Ubuntu 12.10/12.04
Getting Started
Open the terminal and install "dconf-editor" with this command:
sudo apt-get install dconf-tools
Start it now with this command:
dconf-editor &
Head to org >> gnome >> desktop >> interface, then in the left pane of the window, locate "cursor-size" which has a default value of 24.