These collar stays are thick, not too heavy, good quality and do make your collars look very good. These are definitely better than the plastic stays. There are 4 different sizes (6 pieces of each).If you happen to forget the stays in your shirt they are sturdy enough to resist the washing machine cycle. I do not know if they would rust because I have been very careful with them so far. The plastic box is really cheap but this is not an object you have for display on your dresser so the box should not be a concern. This product includes a measure tape that is horrible but this is just a "bonus" I guess.