Occasionally you may find a knife (usually a diminutive pen knife) with “Ladies Knife” marked on its side.  This was a marketing ploy.  Just because a knife is small (even the tiny “charm” sized miniature knives), or very fancy, or made of precious materials, does not mean it was specifically made for women to carry.  In the 19th and early 20th centuries the well dressed gentlemen often carried a small, elaborately decorated knife in a vest pocket or on his watch chain.  Very fancy knives with silver (or silver plated) blades are fruit knives, often given as a love token, but used by men and women.