File folders have to a) hold paper; b) allow labeling; c) fit in the file drawer. Nothing else is necessary. These folders do all three essential functions at a very attractive price.
This has helped me get better organized by allowing me to file manilla folders within a hanging folder by topic. Thus I don't have to search all over my file cabinet for a folder.
I use this in a furniture-based filing cabinet. The built-in poles are 12-1/4" and these are just short of that. I wish there could be some sort of flexibility.