When it comes to deciding on your rehearsal dinner invitations, consider that traditionally, the rehearsal dinner will be held after your wedding rehearsal, and it will usually occur the same evening before the ceremony, although both rehearsal and dinner can be held at any time within the same week.
The couple should send rehearsal dinner invitations to the dinner following the wedding rehearsal two weeks before the wedding. The dinner rehearsal is traditionally hosted by the parents of the groom, and the groom's family is who must send the invitations out, except when for any reason that is not possible and the parents of the bride become in charge.
As all other type of invitations, rehearsal dinner invitations are based on the guest list for the wedding party, but in recent years it is more often to see lists including out-of-town guests that may not be able to attend rehearsal invitations. Consider this when you elaborate your list to save money ordering and sending only invitations to the guests who can arrive to the rehearsals.
Not all wedding rehearsals feature rehearsal dinners, so when you planning your wedding consider if you want to have one, do not forget to assign a budget for it and remember to include both your parents and your fiancé parents, as well as the attendants who will have to be present on your wedding day, such as the bridesmaids, the groomsmen, the ushers, the ring bearer, etc.
Rehearsal dinner invitations can be issued verbally, printed by yourself or made by hand simply buy 5 1/2" x 8-1/2" card stock adding simple words like "Please join us for the rehearsal dinner for the wedding of Bride's name and Groom's name" along with the information regarding where the dinner will take place, including the address, the hour and date.