Drumroll, please: introducing the new J.Crew Stevie knee-high boot. - We gave everyone's favorite style a fall makeover, this time with a more durable sole and a newly refined heel shape that curves in ever so slightly for a more feminine finish. (P.S. We also swapped in a longer-lasting top lift at the heel—because you asked.) Long story short, we want to make sure your favorite styles get even better with age. . .and these are exactly the kinds of tweaks we make each season to do it. Shaft circumference: 38cm/15". Shaft height: 35.5cm/14". 55mm/2 1/4" heel. 100% leather. Rubber/plastic outsole.