How much does it cost to bridge from Polygon to Ethereum?

Excuse me, I'm curious about the cost associated with bridging assets from Polygon to Ethereum. Could you please elaborate on the financial implications of such a transaction? Is there a standard fee that applies, or does it vary depending on factors like network congestion or the size of the transfer? Additionally, are there any hidden costs or considerations I should be aware of before making such a move? I'd greatly appreciate any insight you can provide.