There is no specific regulation on the size of the plaque, which varies according to the use environment. The size and length of the door plaque are generally 60 cm, 40 cm or 70 cm wide, 50 cm wide or 90 cm long and 60 cm wide. Door head refers to the plaque and related facilities set by enterprises, institutions and individual industrial and commercial households at the door, which is a decorative form outside the shop.

The size of the door plaque is related to the structural size of the storefront house. The size, width and location of the signboard will vary with the size, width and floor of the store. The size of the decorative board is not specific and varies according to the different sizes of the use environment. Generally speaking, 10: 3 (for example, 1 m long and 0.3 m wide) is a good size, which looks good. 0.4* 1.2 is a common type of solid wood.

The plaque is a unique cultural symbol of China. It is a comprehensive work of art integrating Chinese language, China calligraphy, China traditional architecture, sculpture and painting, which is both ideological and artistic. The plaque is not only a sign, but also a sign of culture and even a sign of cultural identity. It is widely used in palaces, archways, temples, ancient buildings and Chinese decorations in China, conveying information about imperial power, culture, people, beliefs, commerce and so on.

Plaque is mainly used in the commercial field, and it is a unique advertising form of spreading commercial information in China. It shows the integrity of the store by taking literary works skillfully, relying on the literary talent of business associations, quoting idioms and allusions, attaching myths and legends, inscriptions by celebrities, using auspicious psychology, choosing religious words and expressing gratitude feelings, etc. It is loaded with heavy national business ideas and embodies the color of traditional culture.