The new .59 cent stamp is versatile and will work with most invitations. Do remember that almost ALL invitations will require at least .59 stamps- and square format requires slightly more. Be certain to take a complete invitation ensemble to the post office and have it weighed. Here's one time you simply can not guess. Also- remember to pre-stamp your reply envelopes (preferably with a coordinating stamp).Customized stamps
are also a fun option to consider to further personalize your event.