Under normal conditions the paper size on the Zebra label printers does not need to be manually adjusted; BurraLabel will automatically select the correct paper size for the label you are using. However if it should ever get manually set to a non-standard setting, it can cause problems with printing position as shown below. Note that the printing is offset from the label.
Start -> Devices and Printers (may vary slightly depending on the version of Windows you are using).
Locate the problem printer in the list, right click and select Printing preferences.
Expand the Paper/Output properties and reset the values to those shown below
Apply your changes and close the control panel windows.