These 10 Black Rounded Corners Chipboard ATC Cards have the black throughout the core of the chipboard,. They are cut into 2 1/2 in. x 3/ 1/2 in. with rounded corners and are made from 50pt extra heavy chipboard which is 1/20th of an inch, about the thickness of a penny. These ATCs can be painted with bright acrylic paints, written on with Gel or Milky pens, inked with bright pigment inks, stamped, sanded, distressed, covered with paper, fibers and fabric, stitched, die-cut, layered...the possibilities are endless. You can also cut the chipboard into pieces to add that 3-D dimension to small pieces of cardstock, buttons, tickets, etc. that you are gluing on your ATCs. This chipboard is acid free and packaged in packs of 10. These are amazing, again my favorite word, to use as a base for your ATCs. Many customers have received my ATC creations on this chipboard, and have requested that I create some for you all to buy. Well, here it is guys; dig in!!