Kitchen wall cabinets are essential to any kitchen, providing storage space for dishes, glasses, and other kitchen utensils. 

The standard height for kitchen wall cabinets is 30 or 36 inches. This height is based on the average height of a kitchen counter, typically 34.5 inches tall. The 18 inches of space between the top of the counter and the bottom of the cabinets allows for easy access to the contents of the cabinets.

However, 12- and 42-inch kitchen wall cabinets are also available. The 12-inch tall cabinets are typically used over refrigerators, while the 42-inch tall cabinets are used to provide extra storage space.

The width of kitchen wall cabinets can vary from 9 to 36 inches. The most common widths are 12, 15, and 18 inches. The depth of kitchen wall cabinets is typically 12 inches, but some cabinets maybe 24 inches deep.

The height of kitchen wall cabinets is essential when designing a kitchen. The cabinets should be tall enough to provide adequate storage space but not so tall that they are difficult to reach.