PUZZLE 165 All Shapes and Sizes

There are some symbols on a mural inside some ruins, but the right-hand side of the symbol at the bottom is missing.
Assuming that the symbol at the bottom is created in the same way as the symbols at the top, which one would it be?
Choose the correct one from the four options.

Hint 1

Try to find something the symbols at the top have in common with each other.
Why not start by covering up the right-hand sides?

Hint 2

Split the left and right sides of the symbols and compare them more closely.

Hint 3

A hint is 'mirror'.

Super Hint

The left and right sides are reflections of each other, but with one half a different size to the other.

Answer for 'All Shapes and Sizes'

The answer is 'C'.