Caston Extended Curve by Billini is a staple long boot. Elevate your capsule wardrobe with this statement yet versatile knee high, now available in extended curve to suit all sizes. Featuring; mid, flared block heel closed square toe structured upper knee-high semi-structured wide fit upper full length inner zipper closure closed heel counter synthetic upper, lining and outsole Measurements; Wide fit style, fits a C-E width - Designed to accommodate a more generous and comfortable fit for broader feet Extended curve is suited for calf sizes approximately between 18.11" - 21.42" Find your perfect fit by referring to our Size Guide. Available in Black and Black Suede. Heel height 3.5"cm.