A empty hole can not be empty unless it is sorrounded by material
Even then the empty hole is not empty because it will be filled with material if it is empty, for example a glass that is half full of water is also at least half full of air and is completely full and not half emoty but never mind that
So a smaller hole should require more material to build then a larger hole because less empty space requires more building material
Except a car tire uses more matetial than a pastry donut
Outer space is not a perfect vacuum so empty has never been observed