I thought I'd ruined some shirt collars and decided to iron them and all sorts of other tips and tricks to keep the collar looking clean and tidy. I like to wear old shirts from the 80's and was sad to think that they are rubbish. Luckily I came across this product that comes in multiple sizes! I found this very useful because some collars already had corset pockets sewn in, but not all of those pockets were the same size. With these corsets I can find the ones that match the right collar. This product saved my life and saved me countless dollars from buying overpriced packs elsewhere that only contain 10 packs of the same size and having to buy new shirts.