We require all labels to be printed in 4x6 size format and highly recommend that you eventually start using thermal labels for all your shipments. Labels must cover the entire printing area. 

Paper labels are still okay, please ensure that there is no tape over the barcode and that everything is legible.

Important:

1. Please note that for US Economy and PostNL, thermal labels are mandatory.

2. Any type of USPS Packaging (envelopes and USPS boxes) strictly requires USPS Priority Mail labels.