When referring to a "vocation," most people think simply in terms of priesthood and religious life. In reality, vocation refers to our call from God, and all of us receive a call to live a particular way in order to grow in holiness. So, marriage is just as much a vocation as priesthood or religious life, because it is a path to holiness to which God calls many people.
Thus, I was pleased to see the Curt Jester's vocation posters include multiple callings from God. Here is the marriage poster, but you should definitely check out the others.