The size or shape of the pad may be varied due to the manufacturer, process condition, or KO drum configuration. may consult with vendor, i.e. Koch-Glitsch, for your application.
Usually 100mm thick, but sometimes a 150mm thick pad is used. Voidage should be 97%. Use a SS316 wiremesh type demister for general and non fouling applications. If there is wax, dirt, gunky corrosion inhibitor or similar, use a vane type demister.