Battery wire size?

Hello. My positive clamp is mangled (previous owner) and doesn't tighten very tight to the battery post and I even have a shim on there. I am going to change the clamp to a different style but can't tell what size wire it is and once I cut the connector off I will need to have the correct lug here. So is it 2 - 4 awg wires or are they 2 awg? I searched and someone said 4, but I tried to measure and they seem bigger.