Size

In this picture the basket is zoomed in to see it more clearly. Size is simply the area occupied by a shape compared to the area of another shape. Size is sort of like texture because in this picture it shows the texture of the basket. The picture is so zoomed in that you cannot see anything behind it or around it so you are directed to the center of the basket. In this picture the value scale is used because the pink goes darker going out which creates depth in the picture.