The Packaging Wholesalers Shipping Boxes, 6 x 6 x 6 Inches, 25-Count (BS060606) All cartons ship and store flat to save space. Order in bundle or bale quantities. Corrugated cartons are all 100% recyclable. Master Pack Cartons are specifically designed to hold four 6x6x6's in order to reduce shipping costs. Master Pack Cartons are specifically designed to hold eight 6x6x6's in order to reduce shipping costs.