Check this out!  Spyderco C148PBK Ambitious lightweigh pocket knife.  Keep in mind and take a look at the specs, this is the smallest out of the Ambitious line.  heres the details to keep in mind, This measures only 3.58 inches closed, 5.89 inches open and 2.31 inch blade Lenght. 
 
One of the best parts of this knife is the price point.  a great item for low impact carry.