actually ants have any height and us have any height lets say ant is 1 centimeter and we are meter and some most of us but maybe the ant is 1 micrometer and we are 1 centimeter because eveyrthing is relaitvely maybe we 1 centimeter and ant is 1micrometer but we gave these heights name meter and centimeter and so so actually we cant know our height and the universe size enjoy it its almost proofed if u understand that