eBay

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I'm not finding any info on which boxes I'm supposed to use with USPS ground advantage. Can I use just any regular brown box? I'm so confused about boxes. I have a bunch of brown boxes saved, but not sure what to select in the options to be able to s...

Which one do I pick? USPS Priority Mail1 to 4 business days1 - 4 business days$11.15 - $25.45 USPS Priority Mail Medium Flat Rate Box1 to 4 business days1 - 4 business days$17.10 USPS Priority Mail Large Flat Rate Box1 to 4 business days1 - 4 busines...