Width of Point

• The size of the tip ranges from; 0.18 mm to 1.5 mm, which depends on the usage of the pen. You may go for a smaller size tip for finer and precise strokes, as opposed to a bigger sized tip for thicker and bolder strokes for emphasis. The finer the tip, the less smudges are likely to occur.
  
  

Color

• Different colors are available in packs, and the barrel of the pen is refillable. Different shades and tints give documents a professional look when used to sign signatures.
  
  

Price Range

• Gel pens are not expensive, considering their usefulness. As of October 2010, the price for a gel pen ranged from $3.99 to $16.99.