I had never heard of the Square Cube Law π€ This is what I found:
"The Square-Cube Law states that for mechs, scaling up in size increases their volume (and thus weight) by the cube of the scaling factor, while their strength and surface area increase by only the square of the scaling factor. This means a mech that is twice as tall, wide, and long would be eight times heavier but only four times stronger, making it far more prone to collapse under its own weight and limiting how large mechs can realistically be built without becoming structurally unsound."