We carry common thicknesses of sheet glass at the shop that can be cut to the desired size. Common thicknesses that we have in stock are single strength which is approximately 1/16" thick, double strength which is approximately 1/8" thick, 3/16" thick, and 1/4" thick. Annealed glass can be cut with a normal glass cutter and when it is broken it breaks into large shards that are very sharp. It can not be legally installed in doors or windows within 12" of a door. Safety glass is required for those applications. More information on legal requirements here.
Laminated glass is a form of safety glass. We carry sheets of laminated glass in stock in the common thicknesses of 1/8" and 1/4". These sheets can be cut to size in shop. Laminated glass is two pieces of glass "glued" together with a piece of strong plasitic like material in the middle. This makes it very strong at resisting objects going through it