After You fill out all shipping information and pay the label, UPS will lead you to print the label page. only provides the 4*8 size label, so we will change some value before printing.

1. Click " Get Labels, Receipt, and Forms", then just leave anything blank and click" Print Now"

2. It will lead you to the printing page. 

Please choose your thermal label printer under "Destination", Page>Custom>2, Layout> Landscape, Page size>4*6, Margins> None, Scale>Custom>146. 

Then click "Print", you will get the correct label.