https://nfda.org/news/in-the-news/nfda-news/id/9611/usps-introduces-small-box-and-kits-for-shipping-cremated-remains
USPS Introduces Small Box and Kits for Shipping Cremated Remains National Funeral Directors...
As of March 1, 2025, the United States Postal Service requires the use of the Priority Mail Express (PME) Cremated Remains boxes for all cremated remains...
shipping cremated remains