A sliding shower door made from glass needs to be at least 3/8″ thick, with 1/2″ being a better and more substantial choice.
The thickness of the door will depend on several factors, including the size and weight of the door, the type of materials used, and the desired look and feel of the door.
Some homeowners prefer a thicker door for added stability, while others prefer a thinner door for easier cleaning. Ultimately, deciding what thickness is best for a sliding shower door depends on personal preference.