One 8 count package of 4 x 5.5 inch Jurassic World Invitations with envelopes. Kids are thrilled when they get mail addressed to them! They are going to be especially excited when they see that they are invited to a Jurassic World themed Birthday Party. There is plenty of room to write your party information, as well as room for you to jot a quick note if you wish. Seal your envelopes with fun stickers.