Custom Size: Packing List

Hi there, I wanted to know if custom sizes of packing lists are available with your plugin? I found this the most useful and user friendly out of all the other similar plugins out there. However, as we would like to bulk print packing lists on thermal labels to make things more efficient (A6 size), I was wondering whether this is a feature that’s available, on either the free, or Pro version.

Thank you in advance!