Our industrial turned contemporary open ended envelope with a great string and button closure. It is the standard business size for an 8 1/2" x 11" folded in thirds. It is really more sophisticated, more complex, more developed. The US Post Office says that these envelopes need to be hand cancelled (a surcharge). However, most branches seem just fine with them. To be perfectly safe, we recommend you bring them in to be hand cancelled and see if they charge you. - Size: 4 1/8" x 9 1/2" - Please note: Luxe White, Luxe Cream, Luxe Blush and Luxe Grey have a textured finish and are made of a thicker, 30% cotton paper.