The fashion you're seeing at the moment is footless tights with miniskirts, not leggings. You can but them in all the high street shops (all different colours). I remember wearing them in the 80's, finishing at my ankles. However, girls tend to have them slighly higher these days and make them 3 quarter length. They look great don't they? Not for me, I'm too old but they're good on teenagers.
You'd find it quite hard to buy fashionable leggings at the moment unless you visited some of the 'cheaper' high street stores. They have them but the Lycra content is quite low and if you sat down for any length of time, you'd have 'knees' when you stood back up again (if you know what I mean).
Footless tights with skirts are a very casual daytime look and look great with flat pumps. Don't overdo it by wearing them out of an evening with high heels - yuck!