If there are 180 total guests being invited, then the couple may only need 100 to 140 invitations. Always order a few extra invitations in case the couple realizes they forgot to add someone to the list. Also order extra envelopes in case mistakes are made when addressing the invites.
When to Go Classic _ There are several situations where a classic wedding invitation is the best choice. If you are very religious, and the biggest factor in your wedding is going to be the traditional, religious aspect of it, you may enjoy having the classic wedding invitation more than you would enjoy having a different, more contemporary wedding invitation. If you are inviting many people who have very traditional values, and you want to make the traditional values into what is most important in your wedding, you may also prefer to choose the traditional and classic wedding invitation.