Symbolic proportion is the deliberate emphasis of objects in a work of art based on its importance as a symbol. This can sometimes also mean that in an artwork where symbolic proportion is applied, religious figures tend to be "bigger" or more emphasized compared to any other element a person may see in the piece.
The artist may have used symbolic proportion to emphasize the importance or prominence of Mary and Jesus Christ - this may be relative to any smaller objects around them in the scene.
The first one reminds me of Jesus when he fed the disciples bread with wine.It also reminds me of when thy all bated is feet with perfumes and water.IT reminds me and Note this it should remind everyone of when Jesus came with scars and everyone bowed before him. It is just a piece of art. Beyond understanding.