For example wall cabinets designed to be installed over a refrigerator will be deeper so the front of the cabinet lines up with the front of the appliance.
Standard kitchen wall cabinet depth. The worktop thickness and depth. Here are tall cabinet basic dimensions. Height 720mm depth 560 600mm widths 150 300 350 400 450 500 600 800 900 1000 1200mm plinth 150mm worktop thickness 20 40mm worktop depth 600 650mm cabinet depth overhang at front overall height 890 910mm.
Most commonly wall cabinets are 12 inches deep since this provides a good compromise between storage space in the cabinets and workable countertop space below the cabinet. These are what you find for pantries or broom closets. You can choose these in a size long enough to extend from your floor to the ceiling.
Standard wall cabinets are generally 24 inches in depth. They are less common but very helpful when they are installed correctly.