Girls Superhero Birthday Party Invitations for Kids (12 Count with Envelopes) - Large 4 x 9 Inches Includes 12 invitations and 12 envelopes. Heavy weight cardstock. Flat two sided design with full color on front and back. New larger 4 x 9 inch size, so your invite won't be lost or misplaced. Fill in the blank invites with plenty of room to write your party details: for, date, time, place, rsvp. Cute girls superhero theme with "smash" and "boom" comic book style exclamations, cityscape, and superhero girls ready for action.