The front of the card has a picture of St. Michael and has a prayer:
St. Michael the Archangel,
defend us in battle.
Be our protection against the wickedness
and snares of the Devil.
May God rebuke him, we humbly pray,
And do thou, O Prince of the heavenly hosts,
by the power of God, thrust into hell Satan,
and all the evil spirits, who prowl
about the world seeking the ruin of souls.
Amen.
The back of the card has the Prayer to Your Guardian Angel.
The card can fit in a wallet.