We do have USPS flat rate boxes available upon request. Because not everything can travel via USPS, please do call or email us to request a change to flat rate. Here are the prices, which does include insurance.
USPS Large Flat Rate: $20.65
USPS Medium Flat Rate: $15.65
USPS Small Flat Rate: $8.70
You can call us at 1.877.627.7883 or by emailing firstname.lastname@example.org
Of course, if you cannot find your package, or if it arrives damaged please do let us know immediately. We'll take care of sending the replacement :-)