Invitations come in packages of 8 with 8 envelopes, are in the shape of a baseball and have the word "Party" written across the front. The back has space for you to write the name of the person invited, the date, place, and time of the party, as well as who is giving the party and their RSVP information. Invitations are circular, measuring about 4 1/4" in diameter, and the envelopes measure about 6 1/8" x 4 5/8".