Are there character limitations for packing slip fields?

Hello there @G2it, 

Thanks for posting about this in the community! We are thrilled to have you join us 🙂 

Each of the different field replacements have varying character limits. These limits can be reviewed on the Knowledge Base article for the Custom Store Development Guide. 

Unless limited further via the carrier's label capabilities, the packing slip should should have corresponding character limits. 

I hope this helps 🙂