Some readers of our knowledgebase (we prefer this term over blog), complained about mouse pointer size in Ubuntu 12.04 Precise Pangolin.
It seems that in some cases the size of the pointer is quite a bit larger than it should be (about twice as large as "normal" size), although the different cursors (editing text, hyperlink hand, etc) has correct size. The size changes to the correct size when the pointer is over some application windows (Netbeans, Firefox), but then changes back once it is moved out of the window.
If you experience this issue, you could update the cursor theme ans size to resolve the problem. There are a couple of ways to do this.
First method to change pointer size in Ubuntu
1) Open terminal
2) Enter the following command
sudo update-alternatives --config x-cursor-theme
3) Choose the number of the theme you want (for example, 0 for DMZ-White)
Note: After you change the value, you need to reboot computer (logout and login will not work)
Second method to change Ubuntu cursor size
Also, you can change the cursor's size with dconf-editor.
1) If dconf-editor is not installed on your machine, install it with:
sudo apt-get install dconf-tools
2) Go to org.gnome.desktop.interface
3) Change the cursor size to 24 and cursor theme to DMZ-White
After these changes mouse pointer size should be with proper size in Ubuntu 12.04.