An electrical device outlet cover for use in covering an opening in an outlet box or an opening in an outlet box drywall ring. It includes a front plate having a cut line formed through a first, telescopable portion of the front plate, the cut line allowing the first, telescopable portion of the front plate to be telescoped outwardly from a second, stationary portion of the front plate. Also provided is a cutting guide with a wall that extends generally perpendicularly upwardly from the front plate and follows a path that generally corresponds to a shape of an outlet box or a drywall ring to which the device outlet cover is to be attached. The invention also provides a method for protecting an electrical device in an electrical device outlet during installation of sheet material and providing for accruing cutting of an opening in the sheet material.