21st Birthday Greeting Cards

21st birthday cards for the old key-of-the-door birthday. Personalise a 21st birthday card with their name, photos from childhood to college and your own message, then post it by itself or with a present.

The key of the door

Long before 18 became the legal milestone, turning 21 meant you were handed the key of the door, free to come and go as you pleased. Plenty of Irish families still make more of the 21st than the 18th, with a party in the local hotel, a speech from the parents and maybe a cake shaped like a key. A personalised card fits right into that tradition.

Personalised 21st birthday cards for every relationship

For a son or daughter, a first-day-at-school photo or one from college says it all on a photo design. For a best friend, a line about the stories that can never be told at the party. Brothers and sisters can be as cheeky as they like, and our funny birthday cards will help.

Sending 21st birthday cards around Ireland

We post cards to anywhere in Ireland, so a cousin in college in Galway or a friend working in Cork gets the same 21 birthday card you would have handed over in person. Add one of our 21st birthday gifts to the parcel and include a free greeting message at checkout, or read our shipping information. Turned 18 recently instead? See 18th birthday cards. Next decade? 30th birthday cards.