Size: M: Length: 36cm, Width7cm EU 39-41 How to Use： Do not overstretch! Continue to turn the plastic handle CLOCKWISE until you start seeing surface pressure showing on the shoe.Turn the metal L shaped handle in a clockwise direction until you start noticing surface pressure showing on the shoe. -For Best Results: Leave the stretcher in the shoe for approximately 24 hours. Turn the plastic knob and the metal L shaped handle COUNTERCLOCKWISE to remove the stretcher from the shoe. These stretchers are intended for use in regular size shoes and not narrow or wide shoes. -Way Ergonomic Function: With the adjustable knob featured you can expand men's and women's shoes to the desired LENGTH or WIDTH in just one move!