Priority Mail Small Flat Rate Box 8 5/8" x 5 3/8" x1 5/8"

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The Priority Mail Flat Rate Box features predetermined rates regardless of weight (domestic only). Size: Outside: 8 11/16" x 5 7/16" x 1 3/4" Inside: 8 5/8" x 5" x 1" USPS SKU: SMA LL-FRB Quantity/Pack: 25 Maximum Order: 20 bundles of 25 Call 1-800-610-8734 for orders exceeding the maximum allowable order size Show more