I want to replace the standard front sight on my CZ pistol with a Fiber Optic front sight. I do not wish to replace the rear sight. What size do I need?

CZ factory pistols (exception is the TS and Kadet which come with 7.5mm High) are fitted with a 5.5mm High front sight (when measured from the bottom of the sight to the top of the sight, with the sight OUT of the slide).
So the correct sight for a factory gun would be any 5.5mm replacement sight we sell.
(Unless it is TS or Kadet)