Home » Microbiome Wellness » What Size Is the Usps Shoebox What Size Is the Usps Shoebox Robert Thorne • Oct 13, 2026 • 6 min read Read in-depth updates on What Size Is the Usps Shoebox. 6 Quarts Plastic Shoe Boxes – 13 x 8 x 5″, 6 Quarts. Share Article: Facebook Twitter WhatsApp Telegram Author Robert Thorne Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.