Amazon.com: BOX USA 10 Pack of Artwork/Mirror Corrugated Cardboard Boxes, 37 5/16" L x 4 1/16" W x 31" H, Kraft, Shipping, Packing and Moving : Industrial & Scientific
Amazon.com: Uboxes 3 Picture & Mirror Moving Boxes for Large Pictures up to 40x60" (Includes 12 pieces, to fit 3 sets of Mirror), Kraft,BOXBUNDMIR12 : Tools & Home Improvement