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Product labels are produced one at a time as PDF files, which are supported by most label printers. Different printers support different sizes of label; you can configure boxora with your exact label size in the account setup screen. If you use a thermal label printer, then you don't need to worry about ink replacements, and the labels produced tend to be more robust.
If you're after a budget printer, have a look at the Brother QL560 thermal label printer. It's a simple device that just plugs into your machine with the usual USB cable, then you're good to go! Perhaps one downside is the limited range of labels available; it uses the DK range which include:
The Zebra range of label printers will also be fine.