A4 size brown envelope with closure button The envelope with closure button is made of kraft paper, there are different thickness from 100gsm-450gsm. A4 brown color envelope can be custom logo, color and size. Normally standard of our envelope size is A6, A5,A4 size. Custom envelope will be more welcome to customer. Liyang Paper products co., ltd is a factory and trade company located in Dongguan, China. Specialized in producing gift paper packaging and printing, such as gift box, Paper gift bag, book printing, Notebook, Folder, wine box,jewelry box, cosmetic box, watch box, shoe box,etc.Custom made base on your design is welcome, feel free to contact Liyang printing with your full details. For further discussion, please don't hesitate to contact Miki at S…