What happens to the size in each level in the idealized pyramid as energy is transferred through the trophic levels?

The size is reduced as 80-95% of the available energy at one trophic level is not transferred to the next

Explanation:

There is loss of energy as it is transferred between trophic levels. The decrease in energy as it moves up the pyramid is due to energy loss as metabolic heat when one organism is consumed by another from the next level as it moves up the trophic levels.