Brand stock photo models: typically are 5'9" tall. wear size small or x-small top and 25 or 26 bottoms.
illieco models: Ellen is 5'4" and wears size x-small or small tops, size 25 or 26 bottoms depending on the style. Haley is 5'2" and wears a size small top, size 26 or 27 bottoms.