These 40th birthday party invitations are in packs of 20 sheets with envelopes. They are 19cm tall and 13.5cm wide (7 1/2 inches x 5 1/4 inches). The design includes a multi-coloured balloons and the words birthday party. The number 40 is at the middle of invitations printed in orange. The invitation details are printed on the front and include to, on, at, time, from and RSVP.