How loose is new back glass in a Dart?

mad dog said
my rear glass for my Duster was just the opposite, AMD sent me 2 rear windows that were too big for my opening, i will NEVER buy AMD glass again..Rich

that would be a pia. I haven't installed glass for years. When I first laid onto the body I was wondering how it ever fit. I've got the front windshield to do next. Matt