The number of invitation sets that you will need typically is not equal to the number of guests that you plan to invite. Remember that you will only be sending 1 invitation set per household vs. per guest. Think about your guest list in terms of families, couples and individuals. You’ll also want to be sure to order approx. 25 extra for last minute guests and to have a couple extra for your own keepsakes. {It is much more expensive to order more later.}