What is the difference between leggings, tights, and nylons?

Over the weekend I bought some "leggings" I believe, they go all the way to my ankles. Yet, I have some black ones that are a little bit below my knees. I want to shop online for the ones that go a little bit below your knees to be able to wear with dresses. The ones up to the ankles I don't really see how they can... show more Over the weekend I bought some "leggings" I believe, they go all the way to my ankles. Yet, I have some black ones that are a little bit below my knees. I want to shop online for the ones that go a little bit below your knees to be able to wear with dresses. The ones up to the ankles I don't really see how they can be worn, they look weird. Thank you.
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