The amount of money given to celebrate a person's religious confirmation varies depending on how close the gift-giver is to the confirmed individual. Twenty-five dollars is an appropriate amount for friends to give, but family members may give $100 or more plus another gift that has religious significance.
Confirmation is the last of three religious rituals many Christian children go through to show commitment to their faith. The first is baptism as a baby followed by first communion. If you have given money for the previous two milestones, it's appropriate, but not expected, to give the largest amount for a person's confirmation.