Priority Mail Small Flat Rate Box 8 5/8" x 5 3/8" x1 5/8" – Endicia Supplies Store
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![All about Priority Mail Regional Rate [Updated with 2018 Rates] - Online Shipping Blog | Endicia](https://online-shipping-blog.endicia.com/wp-content/uploads/2017/09/USPS-Priority-Mail-Regional-Rate.jpg "All about Priority Mail Regional Rate [Updated with 2018 Rates] - Online Shipping Blog | Endicia")
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