How to Use: Place the shiny surface on the heel and gently move it to remove the exfoliation. Can be used in any direction. After use, please wash it with water and dry it before storing. Size: 4.0 x 2.0 inches (10 x 5 cm), Approx. 0.1 inches (3.5 mm). Caution: Lightly move without applying force. Be careful not to polish the same part.