What are cigarette pants?

Prada's Cigarette's

Stella McCartney's Cigarette's

How short are they supposed to be?

I went into Top shop today and saw a pair of pants, described as ‘skinny cigarette.’  I thought, these would look nice with that top.

 When I got home to try them on, I realised that either I was too tall for these pants or they were made to fit ‘Michael Jackson style.’

All I know is that these pants are supposed to be wont's trouser's with a boyish fit and can either be above ankle length or below depending on the style.