How can I turn an iTunes song into a ringtone?

How to make ringtones for iPhone

1. Open iTunes on the desktop to get started. …
2. Choose the song you want to use to create a ringtone and click on it.
3. Right-click on the song and choose the Song Info option.
4. Click the Options tab.
5. Choose up to a 30-second period in the song that you’ll want to make your ringtone.