Size: This Birthday invitation cards are measures 4x6 inches. Quantity: There are 20 invitation cards & 20 matching envelopes inside the package. Material: this Birthday invite cards are made of heavy gram coated paper, study & easy to write on, with advanced printing tech, the details & colors are beautifully presented. Applications: When you are preparing a Birthday party, this set of invitation set would be helpful, there are different themes for your to choose, impress your guest with this adorable invites & have a nice party! Size: This Birthday invitation cards are measures 4x6 inches. Quantity: There are 20 invitation cards & 20 matching envelopes inside the package. Material: this Birthday invite cards are made of heavy gram coated paper, study & easy to write on, with advanced printing tech, the details & colors are beautifully presented. Applications: When you are preparing a Birthday party, this set of invitation set would be helpful, there are different themes for your to choose, impress your guest with this adorable invites & have a nice party!