Square envelopes make a stylish, unexpected presentation. Our European-inspired pointed flap square envelopes are great for stationery and invitations. An additional postage charge for being hip and square does apply (check with your local post office). In our soft cotton Luxe grey paper - made in one of the oldest paper mills in Italy. 30% PCW Size - 5 3/4" x 5 3/4" Sold in packs of 10.