Our #10 flat cards are made from cover weight paper and fit into #10 envelopes. This slender design is perfect for sending quick notes or as unique party invitations (we also love them as wedding invitations wrapped with a paper sash). In our soft cotton Luxe Blush paper - made in one of the oldest paper mills in Italy. 30% PCW Size - 3 7/8" x 9 1/4" Sold in packs of 25