There is no default application in distributions to set cursor size but it is always possible through gsettings command line utility.
To get existing cursor size:
$ gsettings get org.gnome.desktop.interface cursor-size
32
As you can see, cursor size in this example: 32
To change it to 64, use following command:
$ gsettings set org.gnome.desktop.interface cursor-size 64
For the best results, you should select one of the size below:
- 24: Default
- 32: Medium
- 48: Large
- 64: Larger
- 96: Largest