Kate Moss square jawed structure

Kate moss has the reputation to be a petite woman... she nonetheless has a large face structure, with well developed cheekbones.

On this image you can see that her jaw box is bigger than that of the other woman.

See how this majestic face is robust: wide, jutting cheekbones. And that shadow under the cheekbones... that's a big prerequisite for super model status.
The jaw isn't particularly wide, there is a slight disproportion between cheekbones and jaw but it removes nothing from this beautiful face.