These Infinite birthday party invitations are in packs of 8 and have envelopes. They are 14cm tall and 10 cm wide (5.5 inches x 4 inches) when folded. The words You're invited to a Birthday party are printed on the front. The background is mainly black with brightly coloured stripes and spots. The inside of the invitations have the details and include For, Date, Time, Place, RSVP and Email.