1.C4,C5,C6 or any size 2.Various materials 3.Any style ... sleeves, memo pad, notes,any sizes, materials, and styles.envelope,Specifications:1) Size: any size (such as DL/ZL/C5 ... ,C4,C6)2) Material: Any type paper and printing3) Packing: 2, ... paper envelopes in different gradeFeatures:1) Buyer's sizes, printing and designs are acceptable;2) Fashionable style and process, ...