Vinyl floors come in a variety of "nominal" thickness options (overall thickness). These can range from 2 mm up to 12 mm. It is important to note that the overall thickness of your floor is much less important than the thickness of the wear-layer, which is always a fraction of a millimeter (or in the case of the Modin Collection, a full 1 mm).
That said, overall “nominal” thickness does matter in one specific case: click flooring. The thicker a click vinyl plank, the easier it is to install, and the more secure the click mechanism. Through testing and feedback from hundreds of installers, we have found that 5 mm is the ideal minimum thickness for click flooring.