Razor blade

A razor blade comprising:

• a substrate comprising a substrate tip formed on an end portion thereof;
• and
• a coating layer formed on the substrate and comprising a coating tip formed on an end portion thereof,
• wherein:
• the substrate comprises a pair of substrate facets extending from the substrate tip,
• when a straight line passing through the coating tip and the substrate tip is referred to as a reference line, a point where a horizontal line that is perpendicular to the reference line and passes through a point x micrometers away from the substrate tip along the reference line intersects with any one of the pair of substrate facets is defined as SDx,
• a thickness of the coating layer at the point SDx is defined as a thickness measured in a direction perpendicular to a straight line tangent to the substrate at the point SDx, and
• a value obtained by dividing a distance between the substrate tip and the coating tip by a thickness of the coating layer at a point SD1 ranges from 1.5 to 3.