HERO ARTS-Folded Cards. Card-making just got easier! With pre-folded cards you save yourself a lot of cutting and folding time and you still get high-quality cardstock. These cards are made of 80lb cardstock, are standard A2 size (5-1/2x4-1/2), and acid and lignin free. They have a colored exterior with a white interior. Perfect for stamping, distressing, and embellishing! Each package contains twelve folded cards (4 each of 3 colors). Available in a variety of color combinations and designs: each sold separately. Imported.