Detailed Product Description The paper is professional paper,kraft paper ,bamboo paper and recycle paper The seal is the saliva glue or self-seal adhesive and the paper is 80-120gsm The window can be customized to single window and double window. We can produce pocket envelope, wallet envelope and seam envelope according to the clients’ needs. We can design and print the colorful patterns and words according to your requirements. Domestic standard specification: ITEM NO. USABLE SIZE PCS/CTN CARTON SIZE (W*L+LIP)MM (W*L*H)MM WE-0 176*110 3000 340*365*330 WE-1 220*110 3000 450*340*330 WE-2 230*120 2000 470*255*330 WE-3 230*160 2000 470*330*330 WE-4 320*230 1000 470*330*330