To update your Etsy settings so it generated 4×6 shipping labels:
1 Sign in to Etsy.com.
2 Click Shop Manager.
3 Click Orders & Shipping.
4 Click View shipping labels.
5 Click Options.
Select Format my labels for 4×6 Label printers.
Please note that after you change the label format to 4 x 6, only new labels will be generated correctly. Kindly void any previously generated labels and create new ones.
Article content source: https://help.etsy.com/hc/en-us/articles/360001968348?segment=selling