Using your own packaging for shipments on the Connect+ and SendPro P-Series
For any carrier, you can choose to use your own envelopes or boxes in which case you will be prompted to select the package type (box, envelope, or irregular packaging) and enter the dimensions and the weight. If you have an attached USB scale, click the scale button and place the package on your scale.
The weight will appear in the Weight field. SendPro® will calculate and display the total postage required once you enter the mail class and any special services.
For detailed information on size and weight restrictions, contact your carrier.
For USPS: https://www.usps.com/
For UPS: https://www.ups.com/
For FedEx: https://www.fedex.com/
UPDATED: July 12, 2023