USPS Priority Mail maximum size

USPS provides shippers with boxes for Priority Mail, however, your own personal boxes may be used as well.

If you choose Priority Mail using your own packaging, the maximum combined length and girth (the thickest part of the package) is 108".

Priority mail is charged by weight only, so as long as your package conforms to these dimension restrictions, and is under 70 lbs. your package should send properly.

NOTE: balloon or dimensional pricing may apply to oversized packages even when below the maximum 108" dimension. Learn more.
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