Mixed media. Please note that I offer free shipping on my aceo cards to SAVE THE BUYER MONEY. These can easily ship with just a stamp, HOWEVER they do not come with tracking that way. If you WANT tracking, you must contact me for an adjusted invoice. To mail with tracking, the cost is $5.40, which is what USPS will charge me at the counter. Please let me know if you are buying multiples so I can ship together. thanks so much.