The envelope has a pure blank design on the front and a unique retro gilding pattern on the back. The unique texture on the paper surface is not as rough as vanilla paper, but the color is more mellow. The gilding color on the back is just right in the light. Thick paper can also better protect the letter, making it durable, firm, and opaque. Chinese and Western color printing envelopes: No. 2, 11 * 18cm, No. 5, 11 * 22cm, No. 6, 12 * 23cm, No. 7, 16 * 23cm, No. 9, 32 * 23cm