Can I use a thermal printer for FBA labels?

Does anyone use a thermal label machine to print the FBA labels? When I click print on my shipment it doesn’t ask what size label I want

Answer:  you can use 6×4 labels. You can usually print out the FBA label by removing the auto center auto rotate option. Then depending on how many pages you can ‘snapshot’ each UPS label and print or you can crop the pdf down to just the ups label and apply to all pages and print.