In deep purple ink on white Rives BFK, a luscious 100% cotton paper. Blank inside. The paper welcomes all use, from basic pencils or ballpoint pens to fountain pens and watercolors, with no unsightly bleeding. Folded over, cards are 3 1/2" by 4 7/8". Each card is matched with an equally indulgent Crane's Lettra 100% cotton 4Bar envelope in a clear plastic sleeve.