Strength, some spiders can lift up to 50 times their body weight, this muscle strength is directly related to size.
Think about your biceps when you work out it increases in height and width, but not length.
In this way, the strength of an organism increases as a square, or by two on the scale factor.
but as organisms get bigger, their volume increases by height, width and length,
as a cube or a three on the scale factor.