These collar clips are very affordable and combine very well with magnets to make your collar look very clean and fresh even when you are not wearing a tie. I bought these not knowing if they are compatible with magnets or not, some collar holders don't work with magnets due to the materials they are made of. They work great and I love the fact that there are multiple sizes in the packaging. I will tell you that I usually only use one pair, mostly two medium sizes as most shirts only use these two collar lengths. There may be a company suggestion to change the number of pieces of each color to pack more into the package of the two middle sizes and less into the two extreme sizes. Overall very happy with this purchase