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.
Adding a favor _ A small favor added to your invitation is becoming a more popular option. If you are having a theme or destination wedding, including a favor is a great way to add some needed information. For the theme wedding, a small candle for a candlelight service is a thoughtful touch. For a beach vacation, a small tote bag with information from the area chamber of commerce is a thoughtful choice. While adding favors to the wedding invitations is a thoughtful touch, and becoming more popular, the cost can add up quickly. Adding favors to invitations typically works best if you are planning a small ceremony, and expect most of your invitees to attend.