The Priority Mail Large Flat Rate Box is a quick, easy, and convenient way for you to ship Priority Mail packages. It features predetermined rates regardless of weight (domestically) or destination, similar to our other Flat Rate products. (Handling fee applied at time of purchase) Inside Dimensions: 12" x 12" x 5-1/2" Outside Dimensions: 12-1/4" x 12-1/4" x 6"
