A wedding invitation is a letter sent to a person, asking the recipient to attend a wedding. They are typically mailed out 6 weeks before the wedding date. Wedding invitations can sometimes have fancy writing on them known as calligraphy. Other types of printing include Engraving, Thermography, Letterpress printing and sometimes Blind Embossing. Most of time, they are mailed in double envelopes. The inner envelope can be lined in a matching color, is not gummed and fits into the outer envelope. The outer envelope is gummed for sealing and addressing.

Along with the wedding invitation, the ensemble may also include a respond card or folder and envelope. The respond card or folder is traditionally used for gathering totals for the caterer and getting a general number of guests attending. The recipient is asked to mail back the respond card or folder roughly two weeks before the wedding or by the date indicated. The envelope is pre-addressed and pre-stamped by the wedding party for ease.

Other pieces often included in the ensemble are the reception card or folder, map or direction card, and accommodation information. The reception card simply lists the addresses and times of any post-wedding events, such as a cocktail hour, dinner or dance. Map or direction cards provide details about the location of the wedding and reception. The accommodation information gives helpful tips about airfare, transportation or hotel arrangements for out-of-town guests. Local attractions may be featured as well. Often times the accommodation information is sent in advance with the save the dates.

A save the date is similar to an invitation and is mailed up to one year before the wedding date. Save the dates simply announce that the wedding date has been set and encourages recipients to plan for the event. It is never a substitute for the wedding invitation and should mention that the invitation will follow.