Keystone wall plates are typically available in standard sizes that match the
dimensions of a standard electrical box, which is 2.75 inches wide by 4.5 inches high.
Keystone wall plates can also come in larger sizes, such as double-gang or triple-gang plates,
which are designed to fit multiple keystone jacks or modules.
The size of a keystone wall plate will depend on the number of keystone jacks or modules that
need to be installed and the layout of the wiring or cabling system.