Herschel labels can be printed on A4 sheets of 8 or 14 labels, for example Avery L7165 and Avery L7163.

Herschel produces its labels as a PDF file.  You may find that when you print the PDF file, the labels do not align correctly.

The usual reason for this is your PDF viewer resized the sheet during printing.  Make sure you select "print actual size" whenever you print labels: