Artist Trading cards are like little works of art 2 1/2" X 3 1/2". Traditionally they were used by artists as sort of a business card from 1 artist to another. I like creating them because just like Art Journaling and Card Making...the possibilities are endless.
I make mine in series of 3- 1 for me, 1 for my son(an artist) and 1 to give away to another artist.
I also like to sign mine all the same on the back.
I keep mine in a 3 ring binder using clear sleeves designed for collector cards.