Locks of Love is a public non-profit organization that provides hairpieces to financially disadvantaged children under age 18 suffering from long-term medical hair loss from any diagnosis.
If you decide to get 10 inches cut from your hair, you can donate your hair to Locks of Love. (I just did this during this summer and it was something that I had always wanted to do.) Here is the "How to donate" information from Locks of Love.
I took my donation to Great Clips (hair cutting salon across the US). They had me fill out a donation sheet and they sent my ponytail in for me. It was a wonderfully rewarding experience, complete with a thank you letter a few weeks later.