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.
Calligraphy. Calligraphed invitations are very elegant. They work well for weddings with an old fashioned theme, but can be very expensive due to the amount of time and effort involved in producing them. Because of the expense, you might also look for a printer who creates the look of calligraphy on printed invitations. Note: When deciding on whether to choose calligraphy invitations, remember that you need to allow extra time for preparation. Keep in mind, too, that this type of invitation may smudge if it comes in contact with moisture.