Dimension - The birthday invitation cards are measures 4 x 6 inches. Unique Design - The unique pattern design and the eye -catching color make people notice it at a glance. In sufficient filling, you can write important information such as Name, Date, Time, Place, and RSVP. High Quality - These invitation cards are made of high quality thick card paper, which are sturdy and durable and not easy to damage; the paper is smooth, which is convenient for filling in different types of strokes. 50th Birthday Party Invitations - These invitations are exquisite additions to your 50th birthday theme party, leaving an unforgettable impression on your guests. Birthday Party Invitations - These invitations are exquisite additions to any birthday theme party, leaving an unforgettable impression on your guests. Quantity - 20 double-sided invitations & 20 envelopes. Dimension - The birthday invitation cards are measures 4 x 6 inches. Unique Design - The unique pattern design and the eye -catching color make people notice it at a glance. In sufficient filling, you can write important information such as Name, Date, Time, Place, and RSVP. High Quality - These invitation cards are made of high quality thick card paper, which are sturdy and durable and not easy to damage; the paper is smooth, which is convenient for filling in different types of strokes. 50th Birthday Party Invitations - These invitations are exquisite additions to your 50th birthday theme party, leaving an unforgettable impression on your guests.