Old broken clavical issue.

[440Charger]

I broke my clavicle about 5 years ago wrestling. It was fractured so it didn't displace much. No brace was required or anything.

I got full range of motion no pain or nothing. No strength difference. Problem is as you can see in the photo one side is significantly bigger. Most people cant tell unless I point it out.

But the question is what can I do to get the size equal again. Should I train the one side more? Heavier?

Thanks in advance guys.