This Card Kit is part of the Vintage Artistry Tranquility Collection designed by Katie Pertiet for 49 and Market. This kit includes eight A2 or standard-size cards with coordinating envelopes in four coordinating designs, you get two of each, two sheets of rub-on transfers, and eight sticker seals. The envelopes are flat, so you will need to add adhesive (sold separately) to seal them. The rub-ons include flowers, butterflies, and many sentiments. These products are acid free.