A personalized envelope is an ideal tool for making a first impression on company partners or customers. Since envelopes and letters are no longer widely used, the personalized envelope gives the company a certain touch of luxury. The envelopes are in DL, C6, C5 and C4 formats in variants without a window or with a window on the right or left. The most common type of paper is offset with a weight of 80 g/m2 or 90 g/m2, but recycled paper with the possibility of self-adhesive closure, sealing with adhesive tape or moistening is also often used.