All rectangular faceplates are 90mm x 132mm (max) and all square inlets are 90mm x 90mm (max) IMPORTANT NOTE: If you are installing an inlet onto an existing solid block plastered or plaster-boarded wall, then rectangular inlets are much easier to install. If you don?t see an inlet finish that you like, please speak with one of our installation consultants because we can provide virtually any finish or match your switches and sockets.