HotLabel is compatible with printing from PayPal. You just need to change your printer settings to a 4 x 6.
Note: PayPal stores labels as files on their website. After you change your label size to 4x6, only new labels will be created in this size. Previously generated labels will remain in the old size. You can always void an old label and when it is created again, it will be in the new size.
To access this setting on PayPal, please
Log in to PayPal and click the Gear Icon in the far top right corner.
Choose Account Settings
On the left-hand side, please choose Shipping
Under Shipping Preferences, click Update
Under "U.S. Postal Service Preferences," click on the Edit printer settings
Pick Label Printer and one of the 4 x 6 printers, such as the "Zebra TLP 3844-Z 4.0 x 6.0"
Login to PayPal www.PayPal.com
Click on Shipping Preferences
Select the Label Printer and any of the 4.0"x6.0" sizes