Caston Curve by Billini is an everyday long boot. Best selling boot Caston is now available in an Extended Curve Fit and Caston Curve; made to fit you, as you are. Elevate your capsule wardrobe with this statement yet versatile knee high. Featuring; mid, flared block heel closed soft square toe structured upper knee-high semi-structured wide fit upper full length inner zipper closure heel height 9cm Measurements; Wide fit style, fits a C-E width - Designed to accommodate a more generous and comfortable fit for broader feet Our Extended Curve collection offers an extra wide-fit calve option, and is suitable for calves 46.8cm - 61.7cm. Wide-calf boots are designed with a wide fit. We recommend sizing down for the best fit. Find your perfect fit by referring to our Size Guide. Available in Black and Chocolate.