The process is exactly the same as if you were purchasing an item: click on ‘continue to payment’ and follow the usual steps. Obviously you will not be asked to provide payment details in the end, and therefore you will not be charged for anything.
This is a pattern for the 2 eyed medium minion from Despicable Me.
My finished minion was 11 inches tall including his hair.
Find more from this designer at: facebook.com/nicholesnerdyknots