uBoxes Corrugated Moving Boxes with Handles, 10 Premium Large, 18" x 18" x 24" - Walmart.com
Amazon.com: Aviditi AF301717 Corrugated Cardboard Box 30" L x 17" W x 17" H, Kraft, for Shipping, Packing and Moving (Pack of 5) : Industrial & Scientific
11 Places to Get Free Moving Boxes | Apartment Therapy