These high quality birthday party invitations are printed on Mettalic finish card and come with mailing envelopes. The invitations are post card style (non-folding) and come in a colorful design that your guests will absolutely love. There are 25 cards in total with 25 accompanying white envelopes all measuring 5×7 inches . The invitations are single-sided and can be written on with pencil or pen without smearing. Not only do they come in rich vibrant colors but they are thick, making them more durable!