Invitation Card Size: Birthday invitation card measures approximately 4 x 6 inches. It is definitely the best choice for your birthday party supplies, letting guests know the theme and specific details of your birthday party in advance. Package contains: One package contains 20 pcs birthday invitation cards, comes with 20 pcs white envelopes. Our cards are fill-in style and easy to use, which save your time. Material and design: Double-sided printing, rich colors, not easy to fade. Made of coated paper, which is thick, not easy to tear and deform. Party details: There are lines printed on the front of the invitation card and enough space to fill in your name, date, time, location and other message. Invite your loved ones and friends to celebrate your special day with beautiful cards!