FURminator - Genuine Product Used item. Used for about a year on a medium-sized dog. For short hair Probably size M (Specifications) ■ Blade width (approx.): 6.7cm ■ Blade length (approx.): 0.5cm ■ Size (approx.): Width 7.5 x Depth 6.5 x Height 15.0cm Instant purchase is OK. Please purchase with the understanding that this is a used item.