Despite the coldness of European weather, Jane Birkin cemented the mini-length trend. Mini dresses, shorts, and skirts are all pieces that Birkin made famous. If you’re stuck on rocking a shorter length in colder weather, simply do as Birkin did and add a pair of sheer tights underneath your bottom piece for extra warmth. This retro look was prime ’70s fashion. With extra layers and shorter hems, this is a combination you can’t miss.