1. Dimension: Each card is 4"W x 6"L, double sided - with enough space to write the infomation out, perfect size for kids. 2. Quantity: Each pack includes 20 cards and 20 matching envelopes. 3. Material: Made of high quality heavy card stock making them durable and easy to write on! 4. Colorful design, very suitable for children's birthday party. Let's kick off an unforgettable party with these lovely invitation cards. 5. All of these invitation cards are carefully designed by our high quality designers. We have other beautifully designed invitation cards for your choice. You can continue to browse invitation cards in our store, always one option fit for you! If for any reason you are not 107% satisfied, contact us, we will do our best to improve our product.