1)Dimension: The Invitation card measuring 4" x 6", ensuring there will be enough place on card for writing. 2)Quantity: 20 Invitation cards with 20 Envelopes per pack, it could meet the needs of your party up to 20 guests, it’s perfect for your next important event. 3)Material: Made of 250grams thick card stock, easy for writing, digital color printing every detail in the card will be presented perfectly. 4)We have multiple designs of the Birthday Party Invitations on selling on our shop, there must be one match your taste waiting for you, go and get it, create your unique Birthday party!!