A Full Swing Mirror or Short game Motion Mirror can really bring some things to light.
You can view your grip, your takeaway, the openness or closedness of your shoulders, hip rotation, numerous things can be fleshed out using a mirror for self-evaluation.
Tour players and elite players use all sorts of mirrors when their coach is unavailable.
Comes with easy-to-use training videos.
Mirror is 12″ x 10.5″.