1-customized size,color,design 2-enviroment-friendly material 3-competitive price 4-100%Quality guarantee We can supply various kinds of envelopes, such as Bubble envelope, windowed envelope, wallet type envelope, diamond type envelope, big pocket envelop and express envelop.Features: 1) Materials: Wood-free paper 80gsm, 100gsm, or other 2) Printing: 1-4 colors 3) Binding: Perfect Binding4) ...