How to set a ringtone to my iPhone 5s?

I created a ringtone in garage band.
It won't show up in my phone or in my settings.
it shows up on my computer in iTunes and everything. It just won't show up in my settings, or in my ringotnes on my phone. So i how would i set it to my phone?

Has to be put in 'Tones' in iTunes then sync over to phone. It'll be on a long(er) ringtone list. Best luck.