Ugg Australia Classic Cardy three button knit boot at Robert Frost Fine Footwear and frostshoes.com! Ugg Australia Classic Cardy can be worn folded down and buttoned to the side or up tall. The Cardy boot is a knit upper with sheepskin lined footbed on Ugg's Classic sole. The Cardy boot in black runs true to size if not a bit small. We suggest a customer who normally wears a size 8.5 buy the 9 and so on. Please message or call if we can assist you in the fit of the Ugg Classic Cardy boot in black at Robert Frost and frostshoes.com.