How to Setup a 4x6 Inch Shipping Label for Printing on Whatnot

Step 1: Access Your Whatnot Profile & Shipments Page

1. Go to Whatnot’s homepage and log into your account.
2. Hover over your profile icon in the upper right corner of the screen.
3. Select “Shipments” from the dropdown menu to open your active shipping orders.

Step 2: Locate Default Label Options

1. On the Shipments page, look for the menu panel on the right side.
2. Scroll all the way down to the bottom of this menu to find “Default Label Options.”

Step 3: Set Shipping Label Size to 4x6

1. Next to “Shipping Labels,” click the pencil icon to edit the settings.
2. A dropdown menu will appear—select “4x6” (the other option is 8 1/2 by 11, which causes sizing issues for standard label printers).
3. Click “Save” to confirm the change.

Step 3: Print Your Label

  For Mobile App

• Download our Flashlabel Pro app via this link:
  https://knaon.com/blogs/knaon-y813-bt/how-to-use-printer-on-the-phone

• Import your PDF into the app and print directly. For detailed step-by-step instructions, please refer to the section titled "Print a PDF Label Using FlashLabel Pro App" in this link: 

  https://knaon.com/blogs/knaon-y813-bt/how-to-use-printer-on-the-phone
  

  If you're using an iPhone, go to "Save Label" and scroll down—you’ll see the "Print with FlashLabel Pro" option (see screenshot). You can print directly from here, no need to save PDFs or images first.

  

   

For Mac

• Enter the preview interface.

• Select the KNAON Y813BT printer.

• Choose paper size: 4×6inch.

• Click Print.

For Windows

• Enter the preview interface.

• Select the KNAON Y813BT printer.

• Choose paper size: 100×150mm.

• Click Print.

Important Notes

• This setting applies to all new shipping labels you generate. It won’t retroactively adjust labels you’ve already printed, so always set it before creating labels.
• If you use a thermal label printer, 4x6 is the standard size for seamless printing.