If the walls had ears, what would q-tips look like?

Q-tips would not look any different.

First of all if walls did have ears who knows how big or small they would be so the size of the q-tip would not need to change if the ears were creepily similar to ours.

Secondly a wall may have ears, but it does not have arms or hands to use the q-tip

Lastly, there is the warning on the q-tip box that states “Do not insert swab into ear canal. Use only on the outer surfaces of the ear. Keep out of reach of children.” So the wall’s ears should not have q-tips inserted into them anyways.