5-3/8 inches overall, 5 inches of teeth. 

Teeth have rounded tips that won't scratch and scrape on your skin.  Nylon material flexes as you would expect.  Practical Aesthetics logo on handle.  A test print (illustrated) looks and feels quite satisfactory.

A little pricey as pocket combs go, but how many can brag they are 3D printed?  Less if added to a below-minimum Shapeways order. 

For a coarse/fine version, see http://www.shapeways.com/model/259456/.